choroidal granulomas in sistemic sarcoidosis

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    CHOROIDAL GRANULOMAS INSYSTEMIC SARCOIDOSIS

    UDAY R. DESAI, MD,* KHALED A. TAWANSY, MD,*BRIAN C. JOONDEPH, MD, RHETT M. SCHIFFMAN, MD, MS*

    Purpose: To evaluate the clinical course, including response to therapy, of patients with

    macular and peripapillary choroidal granulomas secondary to systemic sarcoidosis.

    Methods: This is a retrospective case study and literature review. Nine patients withchoroidal granulomas were identified. Eight patients had a tissue biopsy confirming sarcoid-

    osis; one was diagnosed from clinical history and typical gallium scan. Ocular examinations

    included fundus examination, fluorescein angiography, and visual field examination. Eight

    patients had magnetic resonance imaging (MRI) scans looking for intracranial granulomas.

    Treatment consisted of oral prednisone in eight patients (one with concomitant subconjunctival

    triamcinolone); one patient received no treatment because of good vision and granuloma in the

    nasal retina. Variables studied included visual acuity (VA), response of granulomas to treat-

    ment, time to recurrence, and associated anterior segment findings.

    Results: Eight of nine patients had a solitary lesion whereas one had multifocal

    involvement. The granulomas ranged in size from one half to four disk diameters. Eight

    patients had blurry vision; one was asymptomatic. All nine patients had hilar adenopathy

    and/or pulmonary parenchymal disease. No patient had nonocular neurologic symptoms

    and in eight patients who underwent MRI examination no intracranial granulomas weredetected. Of the eyes that were treated (n 8) all had decrease in the size of the choroidal

    mass at an average of 4 months of treatment. Two had complete resolution. Mean

    follow-up was 29.2 months. At the time of initial diagnosis only one patient had an active

    anterior uveitis. Five of nine patients had at least one recurrence. Mean time to recurrence

    was 7.6 months after discontinuing oral prednisone. The VA at presentation ranged from

    20/30 to 20/300. Final VA was 20/30 or better in all patients.

    Conclusions: Choroidal granulomas related to systemic sarcoidosis respond well to

    oral corticosteroids. They may recur but good vision can be maintained. They are not

    typically associated with concomitant iritis and also do not appear to be associated with

    intracranial granulomas.

    RETINA 21:4047, 2001

    Sarcoidosis is an inflammatory disease of unknown

    etiology whose histologic hallmark is the presenceof noncaseating granulomas composed of epithelioid

    cells and Langerhans giant cells. Any organ system

    may be affected, but more frequent involvement may

    be seen in the lungs, liver, skin, central nervous sys-

    tem (CNS), and eyes.1 The incidence of ocular disease

    in biopsy-proven sarcoidosis has ranged from 26 to

    63% in recent studies.24 These same studies show

    uveitis affecting between 28 and 74% of patients with

    ocular sarcoidosis. James et al have found the most

    common ocular manifestation to be anterior uveitis,

    which occurs in 60% of patients with eye disease.5

    Posterior segment findings, which are seen in approx-

    From *Eye Care Services, Henry Ford Health Sciences Center,and VitreoRetinal Consultants, P.C., St. Johns Hospital MedicalCenter, Detroit, Michigan.

    Reprint requests: Uday Desai, MD, Eye Care Services, HenryFord Health System, 2799 W. Grand Boulevard, K-10, Detroit, MI48202.

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    imately 25% of patients with ocular involvement, in-clude vitritis, retinal vasculitis, chorioretinitis, and

    granulomas of the retina, optic nerve, or choroid.612

    Five and one half percent of patients with ocular

    sarcoidosis have been noted to have choroidal granu-lomas.6 If only patients with posterior segment in-

    volvement are examined the incidence of choroidalgranulomas rises to 12%.13

    Patients with posterior segment disease have beenshown to have twice the incidence of CNS involve-

    ment when compared to the whole population of pa-tients with sarcoidosis.6,13 Whether all types of poste-

    rior disease are associated with CNS manifestations isuncertain. Similarly, it is uncertain whether all pa-

    tients with posterior segment sarcoidosis are a homo-geneous group. To further define the characteristics of

    sarcoidosis-related choroidal granulomas, includingtheir potential to be associated with CNS involvement,

    we performed the following retrospective study.

    Patients and Methods

    We reviewed the charts of all patients with a diag-nosis of sarcoidosis who were seen at the ophthalmol-

    ogy department of Henry Ford Hospital between 1990and 1995. Eight patients were identified who had a

    creamy-white elevated choroidal mass in the maculaor peripapillary area. An additional patient was in-

    cluded in this analysis from a local practice. All ninepatients were African American. Age at diagnosis

    ranged from 31 to 68 years (mean, 48). Eight of ninepatients had negative purified protein derivative (PPD)tests with controls. The patient with a positive PPD

    also had a positive tissue biopsy for sarcoidosis andhis response to steroid treatment was more typical for

    sarcoidosis. Eight patients had a positive tissue biopsyconfirming sarcoidosis. One patient was diagnosed

    from her clinical history and typical gallium scan.Fluorescein angiography (FA) and perimetry were ob-

    tained routinely in all patients, as indicated by theclinical course. Magnetic resonance imaging (MRI)

    scans were performed on eight of nine patients to ruleout intracranial granulomas. Patient follow-up was a

    minimum of 1 year. Mean follow-up was 29.2 months.Indication for treatment was any decrease in visual

    acuity (VA) that was secondary to the presence of thegranuloma. The cause of the visual decrease was ei-

    ther a mass effect on the macula or optic nerve or anaccumulation of subretinal fluid in these areas. Treat-

    ment modalities included oral prednisone in all treatedpatients and subconjunctival triamcinolone injection

    in one patient. One patient did not require treatment.Treatment was tapered based on clinical response.

    Angiotensin converting enzyme (ACE) levels were

    available at presentation in all patients and on resolu-tion of the granulomas in seven patients. Detailed

    clinical summaries of three representative cases aredescribed.

    Case Reports

    Case 1

    A 39-year-old man presented with subcutaneous skin nodules

    and swollen wrists in April 1992. Skin biopsy revealed noncase-

    ating granulomas. Chest x-ray showed interstitial nodules and ACE

    was 99 U/mL (normal 1170). He was treated with 80 mg of

    prednisone orally, which was tapered according to his clinical

    response. In May 1993 he was referred by his optometrist for

    fundus evaluation. Visual acuity was 20/25 bilaterally and he had

    early nuclear sclerotic cataracts. Funduscopy of the right eye re-

    vealed two creamy-white choroidal masses. The first lesion, which

    was located inferonasal to the disk, was 1 disk diameter (DD). The

    second lesion, which was present under the superotemporal arcade,

    measured 2 DD. The left fundus had an area of punctate pigmentepithelial defects in the inferotemporal periphery. On FA, the

    masses showed early choroidal hypofluorescence followed by late

    leakage and staining. Oral prednisone was again started at 80 mg/d

    and was tapered on a monthly basis as long as the lesions were

    regressing.

    In April 1994 he had photopsia and metamorphopsia. Vision had

    dropped to 20/50 in the right eye and there was an increase in the

    size of the granuloma under the superotemporal arcade. Increasing

    exudation with subretinal fluid encroaching on the foveal avascular

    zone was seen. Subretinal hemorrhage was noted, and FA demon-

    strated a subretinal neovascular membrane (Figures 1 and 2). No

    inflammation was found in the anterior segment or vitreous. The

    patient was treated with prednisone 80 mg/d for 1 week. This was

    followed by a decremental tapering of the dose, which befitted

    the clinical improvement of the granulomas. By August themembrane had disappeared, the lesions had completely re-

    gressed, and vision returned to 20/25. On reevaluation in March

    1995, he had blurred vision. Visual acuity was unchanged, and

    there was a new granuloma nasal to the optic nerve in the left

    eye that measured 1 DD. He was restarted on 40 mg/d of

    prednisone and the lesion regressed over the next 2 months,

    leaving a choroidal scar. He has since been weaned off steroids

    with no recurrence to date.

    Case 2

    A 31-year-old man was seen in March 1993 complaining of

    blurred vision in the right eye. He had a history of pulmonary

    sarcoidosis diagnosed 2 years earlier after presenting with bron-chitis. His chest x-ray showed hilar adenopathy and a transbron-

    chial biopsy revealed noncaseating granulomas. When first exam-

    ined, he was taking 10 mg/d of oral prednisone. His VA was 20/25

    in the right eye and 20/20 in the left. Anterior segments were quiet

    and without evidence of prior inflammation. In the center of the

    right macula was a choroidal granuloma that was 2 mm wide and

    2 mm in thickness. The periphery of the right fundus was unaf-

    fected. Funduscopy of the left eye was unremarkable. Fluorescein

    angiography of the right eye showed hypofluorescence from block-

    age of the choroidal vasculature with late leakage and staining. The

    patient was observed for the next 6 months; the lesion remained

    relatively stable. In September 1993, VA deteriorated to 20/60 in

    the right eye, and there was elevation of the neurosensory retina

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    (Figure 3), with fluorescein leakage extending into the fovea. The

    patient was treated with 80 mg of oral prednisone, which was

    tapered according to the clinical response. The lesion decreased in

    size over the subsequent 2 months and vision improved to 20/25 in

    the right eye. By February 1994, the prednisone was discontinued.

    He had retinal pigment epithelial atrophy in the area of former

    elevation (Figure 4). Vision has remained stable since. Anterior

    segment and vitreous has remained free of inflammation through-

    out his course.

    Case 3

    A 48-year-old woman was seen in January 1991 after referral by

    her internist. She had a history of systemic sarcoidosis for the last

    5 years. She had presented with bronchitis and a chest x-ray

    showed bilateral hilar adenopathy. Biopsy of skin nodules revealed

    noncaseating granulomas. She had been treated intermittently with

    oral prednisone for skin plaques, and was starting hydroxychloro-

    quine therapy. She had a history of high myopia, Fuchs corne-

    aldystrophy, and anterior uveitis in the right eye. Visual acuity was

    20/20 bilaterally and color vision was normal. Both corneas had

    mild guttata. No synechiae were observed. Anterior chambers were

    quiet and the lenses were clear. The right fundus had retinal

    pigment epithelial atrophy extending from the optic nerve and

    along the inferotemporal arcade. The patient was observed with

    routine examinations until July 1994, when she had deteriorating

    vision in the right eye. Visual acuity had dropped to 20/25 andthere was a 1 relative afferent pupillary defect. Color vision

    remained normal, but perimetry showed an enlarged blind spot.

    Fig. 1. Superotemporal macula of the right eye shows cream-colored

    choroidal granuloma. Subretinal hemorrhage is present on nasal side ofmass. A retinochoroidal anastomosis is seen in the center of the mass.

    This manifests as a retinal arteriole diving into the granuloma.

    Fig. 2. Mid-arteriovenous fluorescein angiography shows hyperfluo-rescence of the granuloma. The subretinal neovascular membrane re-

    sponsible for the subretinal hemorrhage is demonstrated by the whitearrows.

    Fig. 3. Choroidal granuloma located in the macula of the right eye.

    Surrounding the yellow granuloma is a ring of neurosensory retinal

    elevation.

    Fig. 4. Pigment mottling and atrophy of the pigment epithelium is

    seen in the center of the macula as the granuloma has resolved. Thedark shadows in the superonasal macula are a photographic artifact.

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    There was choroidal elevation in the area of previous atrophy with

    accumulation of subretinal fluid. The optic nerve was hyperemic

    with blurring of the inferior margin. Fluorescein angiogram

    showed massive leakage from the optic nerve. No anterior or

    posterior segment inflammation was seen.

    She received a subconjunctival injection of 20 mg of triamcin-

    olone in the inferotemporal quadrant and was started on 80 mg/d of

    oral prednisone. Vision remained stable on monthly examinations.

    The prednisone was tapered over 8 months. In November 1995, she

    was taken off hydroxychloroquine by her dermatologist. She then

    had grayness in the right nasal visual field. Visual acuity had

    dropped to 20/200 in the right eye and there was a 3 right afferent

    pupillary defect. There was massive elevation of the granuloma to

    4.0 mm in thickness with associated optic nerve edema. Vitritis

    was not present. Prednisone was restarted at 80 mg/d. Seven

    weeks later vision improved to 20/40 and the granuloma de-

    creased in size. Head MRI showed no evidence of intracranial

    sarcoidosis. By January 1996 the choroidal mass had resolved

    but a macular scar remained (Figures 5 and 6).

    Results

    Nine patients were identified with a diagnosis ofsarcoidosis with the presence of a choroidal granu-

    loma in the macula or peripapillary region (Table 1).Five patients were women and four were men. All

    were African American. Age ranged from 31 to 68years with a mean of 48 years. The eight patients who

    had a positive tissue biopsy for sarcoidosis had thediagnosis made before the presentation of the choroi-

    dal granuloma. The most common sites for biopsyincluded the bronchioles and the skin. The patient

    diagnosed with sarcoidosis clinically was diagnosedafter the development of the ocular findings.

    Eight of nine patients had a solitary choroidal gran-

    uloma around the posterior pole. Two were peripap-illary and three were subfoveal. One patient each had

    a granuloma located along a temporal arcade, in thetemporal macula, and in the nasal midperiphery. One

    patient had a multifocal presentation with granulomaslocated in the superotemporal and inferonasal quad-

    rants of the right eye. He subsequently developed agranuloma in the nasal midperiphery of his left eye

    while under observation.The granulomas ranged in size from 0.5 to 4 DD.

    One of nine patients was visually asymptomatic. Thiswas a 44-year-old man who presented with a com-plaint of burning eyes, which was related to lacrimal

    insufficiency. Funduscopy showed an asymptomaticgranuloma along the superotemporal arcade. The re-

    maining eight patients had blurred vision. Three de-scribed metamorphopsia, two described seeing halos,

    and two described para central scotomas. Systemic fea-tures of sarcoidosis included hilar adenopathy and/or

    pulmonary parenchymal disease in nine patients, cu-taneous granuloma in three patients, lacrimal dysfunc-

    tion in one patient, and hypercalcemia in one patient.Fluorescein angiography in the acute untreated le-

    sions showed early choroidal hypofluorescence due toblockage from the mass. By the arteriovenous phase,

    there were multifocal spots of hyperfluorescence fromthe lesion, which continued to leak throughout the

    remainder of the angiogram. This leakage would poolin the subretinal space in areas of neurosensory retinal

    detachment. Also, late staining of the choroidal masswas observed. Fluorescein angiography in treated le-

    sions displayed retinal pigment epithelium windowdefects. In the two cases of peripapillary involvement

    marked leakage was observed from the optic nerve.

    Fig. 5. Optic nerve is edematous with blurred disk margins. Yellowwhite choroidal elevation is seen in the peripapillary retina inferotem-

    poral to the optic nerve.

    Fig. 6. After oral steroids, the peripapillary choroidal granula is seen

    to decrease in size and the optic nerve is better defined.

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    Table

    1.PatientCharacteristics

    Age,

    yr/Sex

    Eye

    Tissuefor

    Diagnosis

    Anterior

    Segment

    Involv

    ement

    Location

    OtherOrgan

    Invo

    lvement

    Treatment

    Modalityand

    Duration,mo

    Worst

    Snellen

    Acuity

    Final

    S

    nellen

    Acuity

    ACELevel,

    /mL,

    Initial/at

    Resolution

    PosteriorSegme

    nt

    Complications

    Timeto

    Recurrence,

    mo

    39/M

    R

    Skin

    None

    Superotemporalarcade

    andinferiormacula

    Skin,lu

    ngs,

    perip

    heralnodes

    Prednisone,4

    20/50

    20/25

    99/93

    Subretinalheme,CN

    VM,

    chorioretinalscar

    7

    31/M

    R

    Bronchial

    None

    Subfoveal

    Lung

    Prednisone,6

    20/60

    20/20

    185/27

    Retinalpigmentepith

    elial

    defects,pigmentc

    lumps

    None

    48/F

    R

    Skin

    Remote

    iritis

    Inferiorperipapillaryand

    inferotemporalarcade

    Lung,s

    kin

    Peribulbar

    Depo-Medrol,

    prednisone,8

    20/200

    20/30

    34/26

    Chronicmasswithm

    acular

    starexudate

    4

    44/M

    R

    Lacrimal

    None

    Superiorparafoveal

    Lung,lacrimal,

    perip

    heralnodes

    Prednisone,2

    20/50

    20/25

    185/120

    Telangiectasis,exudates,

    chronicmasses

    3

    44/F

    L

    Bronchial

    None

    Peripapillaryand

    parafoveal

    Lung

    Prednisone,4

    20/40

    20/20

    71/57

    Shuntvessels,chron

    ic

    mass,chorioretinal

    atrophy

    6

    53/F

    L

    Bronchial

    Panuv

    eitis

    Temporalmacula

    Lung

    Prednisone,2

    20/100

    20/30

    241/145

    Vasculitis,BRVO,

    chorioretinalatrophy

    18

    38/F

    R

    Bronchial

    None

    Foveal

    Lungs,

    kidneys,

    hypercalcemia

    Prednisone,8

    20/40

    20/25

    134/43

    Telangiectasis,

    chorioretinalatrophy,

    epiretinalmembran

    e

    None

    67/F

    L

    Gallium

    scan

    Remote

    iritis

    Nasalarcades

    Lungs

    None

    20/25

    20/25

    57

    Chorioretinalscar

    None

    68/M

    L

    Skin

    Iritis

    Inferotemporalmacula

    Skin

    Prednisone,11

    20/200

    20/30

    7

    Chorioretinalatrophy

    None

    ACE,angiotensin-convertingenzyme;CNVM,choroidalneovascularmemb

    rane;BRVO,branchretinalveinocclusio

    n.

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    Visual field examination of these two peripapillary

    lesions showed an enlarged blind spot in one and a

    paracentral scotoma in the other. One of these two

    patients had an afferent pupillary defect that resolved

    with systemic steroid therapy. The second patient did

    not have an afferent pupillary defect. Both patients

    with peripapillary granulomas had normal colorvision.

    None of the nine patients had nonocular neurologic

    symptoms. Eight of nine patients underwent gadolin-

    ium enhanced MRI of the head. No intracranial le-

    sions and specifically no intracranial granulomas were

    detected.

    Treatment dosages for prednisone ranged from 40

    to 100 mg per day initial dose, with a tapering of the

    dose over 3 to 6 months depending on the clinical

    response. Lesions responded to prednisone therapy

    within an average of 4 months. Two patients had

    complete resolution of the lesion, so that no residual

    mass could be detected, and only mottling of the

    retinal pigment epithelium remained. Of these two

    patients, one had a subfoveal granuloma, and pre-

    sented at the onset of symptoms. The second patient

    had a granuloma develop in the temporal macula of

    his only functioning eye. It is presumed therefore that

    he presented early in the course of the granuloma and

    was promptly treated with systemic prednisone. This

    prompt treatment may have played a role in allowing

    complete resolution of the choroidal masses. The re-

    maining patients had longer times from the onset ofsymptoms to the initiation of treatment. These seven

    patients had regression of the choroidal lesions with

    reabsorption of the subretinal fluid, but without com-

    plete disappearance of the granulomas.

    Five of nine patients had at least one recurrence

    after tapering off prednisone. These were growths of

    the initial choroidal mass, with increasing subretinal

    exudation. One patient developed a choroidal granu-

    loma at a new focus in the fellow eye. The mean time

    to recurrence was 7.6 months after discontinuing pred-

    nisone. One patient had active anterior uveitis when

    the choroidal granuloma appeared. Two patients hadan antecedent history of iritis, and another developed

    panuveitis 20 months after the granuloma had become

    quiescent.

    The initial VA at presentation was variable, ranging

    from 20/30 to 20/300. The patients with the most

    subfoveal fluid and thickest lesions had worse VA.

    The final VA was uniformly good, ranging from 20/20

    to 20/30 in all patients. The patients with subfoveal

    lesions had subjective complaints of distorted vision

    despite good Snellen acuities.

    Discussion

    In our series, anterior uveitis does not appear to be

    associated with the acute choroidal granuloma. Four

    patients had a history of anterior uveitis but only onehad the uveitis concurrently with the granuloma. This

    finding is in agreement with Tingey and Gondersreview of seven similar cases in which only one pa-

    tient had a remote history of granulomatous uveitis.14

    This lack of associated anterior segment involvement

    differs from other varieties of posterior segment dis-ease that occur in sarcoidosis.

    Obenauf and associates found that posterior seg-ment disease was unlikely in the absence of anterior

    segment involvement.6 In their study the majority ofpatients with posterior segment disease had chorioreti-

    nitis or retinal vasculitis. The higher incidence ofanterior uveitis in patients with chorioretinitis or ret-

    inal vasculitis has been described by other authors.Duker et al described 11 patients with retinal vascu-

    litis, seven of whom had concomitant anterior uve-itis.15 Chorioretinitis associated with sarcoidosis has

    been shown by Deutsch and Tessler16 and by Larde-noye and associates17 to be consistently accompanied

    by anterior uveitis. Patients with choroidal granulo-mas cannot be relied upon to have anterior chamber

    reaction to serve as an indicator of posterior segmentdisease.

    Our patients show that, in fact, unless secondaryinvolvement of the macula or optic nerve is present,

    choroidal granulomas may go unnoticed. The impor-tance of identifying an asymptomatic choroidal gran-

    uloma is open to debate. The uniformly good visual

    outcome in our patients supports the notion that, evenif asymptomatic lesions are allowed to become symp-

    tomatic by a lack of identification, VA is not compro-mised as long as adequate treatment is administered.

    Alternatively, it may be consequential not to iden-tify an asymptomatic granuloma, if the presence of

    one may be a harbinger of CNS disease. Whereascertain forms of neurosarcoidosis may result in mini-

    mal dysfunction, others have lower 2-year remissionrates with increased morbidity and mortality.18 Poste-

    rior segment disease in ocular sarcoidosis has beenlinked to CNS abnormalities.19 Gould and Kaufman

    noted a much higher rate of neurosarcoidosis in pa-tients with fundus abnormalities when compared to all

    patients with sarcoidosis (37%2%).13 However, themajority of their patients had retinal periphlebitis or

    perivenous nodules. In our patients clinical examina-tion and MRI scanning did not disclose any evidence

    of associated CNS involvement. Whereas it is incor-rect to say that CNS disease does not occur in patients

    with choroidal granulomas, given the small number of

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    our patients, it does not appear to be a frequentaccompaniment.

    Given the lack of asymptomatic CNS lesions onMRI scanning we would not advocate routine neuro-

    imaging in patients with choroidal granulomas. Vari-ous articles that deal specifically with sarcoid gran-

    ulomas of the choroid have also failed to identifyCNS lesions in their patients.14,2023 Whereas the

    few patients in the literature and in our study pre-clude any statistical meaning, it seems prudent to

    perform neuroimaging only on patients with neuro-logic symptoms.

    Other ancillary tests did not have a prominent rolein the diagnosis and management of choroidal granu-

    lomas. Because eight of our nine patients already wereknown to have biopsy-proven sarcoidosis, diagnosis

    was made on clinical examination. Angiotensin con-verting enzyme levels were not particularly helpful in

    diagnosing the granulomas as four of the nine patientshad normal ACE levels at the time the granuloma was

    diagnosed. The ACE levels also did not correlate withthe size of the granuloma. However, in patients with

    grossly elevated ACE levels at presentation, a subse-quent drop correlated well with flattening of the mass.

    These patients were treated with systemic steroids andthe drop in the ACE level probably reflected a reduc-

    tion in extraocular granuloma formation.The FA findings were nonspecific. The diagnosis of

    sarcoidosis-related choroidal granulomas cannot be

    made solely on angiography. Amelanotic choroidal

    melanoma, choroidal hemangioma, metastatic lesions,and other granulomas are in the differential diagnosis.The FA is useful in identifying associated choroidal

    neovascularization and can be used to monitor reso-lution of the new vessels during treatment with oral

    corticosteroids.Visual field testing failed to identify any unsus-

    pected lesions of neurosarcoidosis. Whereas it is un-likely to find visual field abnormalities in patients who

    do not have MRI evidence of visual pathway abnor-malities it is possible that subtle lesions in the retro-

    bulbar optic nerve or chiasm may result in visual fieldabnormalities. Our patients have visual field abnor-

    malities that correlate with their funduscopic findings.These findings indicate that the likelihood of finding

    CNS involvement by visual field testing seems to besmall in cases of sarcoidosis-related choroidal granulo-

    mas. Routine perimetry does not appear to be indicated.In 1982, Marcus and associates reported two pa-

    tients with biopsy proven sarcoidosis and macularchoroidal granulomas.20 Both lesions completely re-

    solved with steroid therapy, leaving retinal pigmentepithelial defects that transmitted but did not leak

    fluorescein. Both patients had a final acuity of 20/20.

    Olk and associates described a similar patient with aperipapillary granuloma that completely resolved with

    systemic steroids.21 In 1984, Campo and Aaberg re-ported two patients with similar lesions, but only

    partial resolution of the choroidal granulomas oc-curred with systemic steroid therapy.22 Final acuities

    were 20/60 and 20/25, but the first case had associatedgranulomatous iritis. There was no apparent correla-

    tion between the size of the lesion or duration oftherapy and the extent of flattening. In the current

    study, two of nine patients had complete resolution oftheir granulomas, such that no creamy white subreti-

    nal deposit could be seen, and only pigmentary abnor-malities remained. The remaining seven patients had

    partial flattening of the masses with resolution of themacular neurosensory detachments when present and

    excellent visual outcomes.Both patients in this study who had complete dis-

    appearance of the granulomas had the initiation ofsteroids within a week of the onset of their symptoms.

    Of Marcus et als and Olk et als patients with com-plete resolution, two of three had treatment initiated

    within 1 week of treatment.20,21 The third patient hadcomplete resolution even though symptoms were

    present for 2 months before treatment was begun. OfCampo and Aabergs patients with partial resolution,

    one was treated 3 months after the onset of symptomsand the second was treated 1 week after the develop-

    ment of symptoms.22 It is possible that earlier treat-ment may permit more complete reduction of the

    choroidal mass in these patients, but it is difficult withsuch a small number of patients to say this with any

    degree of certainty.In this study, the average time to resolution4

    monthswas comparable to the 3 months reported in

    a patient of Campo and Aaberg.22 Olk et als patientresolved within 5 months21; the two patients of

    Marcus et al resolved in 3 weeks and 1 year,respectively.20

    Similar to Campo and Aaberg, we had a patientwith a choroidal neovascular membrane that disap-

    peared on prednisone therapy; no laser treatment wasnecessary. Frank and Weiss described a subretinal

    neovascular membrane in an eye with multiple wide-spread choroidal granulomas and panuveitis.7 They

    were able to treat the membrane successfully with laserphotocoagulation. Because systemic prednisone was

    effective in allowing involution of the choroidal neo-vascular membrane in our patient we would advise such

    treatment before proceeding to laser photocoagulation.In a 1955 report on pulmonary sarcoidosis, Scad-

    ding wrote that if the lesions are in a reversible stage,cortisone can cause dramatic clearing, but there is

    equally no doubt that, after this dramatic clearing, the

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    lesions frequently recur.9 After discontinuing pred-nisone, five of our nine patients relapsed at least once,

    with enlargement of the choroidal mass and detach-ment of the overlying retina. All had expansion of flat

    choroidal masses and one had a new granuloma form.Because the mean time to recurrence was 7.6 months

    after discontinuing oral corticosteroids one may get afalse sense of security once the granuloma responds to

    treatment. Patients should be told to carefully monitortheir visual function and to report any changes

    promptly. Recurrences respond to retreatment withsystemic steroids and if multiple recurrences occur,

    multiple treatments with tapering doses of corticoste-roids may be necessary.

    The excellent visual outcomes in our series of cho-roidal sarcoid granulomas contrast markedly with

    Laties and Scheies review of 11 cases of optic nervegranulomas in which 5 of 11 had final vision of count

    fingers or less, and an additional two had vision of6/18.24 The worse outcomes in the patients reviewed

    by Laties and Scheie probably reflect the intraneuralor extraneural mass effect of optic nerve granulomas

    and its effect on damaging optic nerve fibers. Pooroutcome of granulomas of the optic nerve has also

    been described by others. Kelley and Green describeda case of an optic nerve granuloma where significant

    necrosis in the optic nerve mass may have contributedto the visual demise.25 Statton et al showed a case

    where an optic granuloma led to blindness, presum-ably from mass effect on the optic nerve.26

    Our series, the largest of its kind, agrees with pre-vious reports demonstrating a good prognosis and

    responsiveness to systemic corticosteroids for choroi-dal granulomas. This should include peripapillary le-

    sions that encroach on the optic nerve but do not

    infiltrate it. These lesions differ from other posteriorsegment abnormalities in sarcoidosis. They are less

    likely to be associated with inflammation and appearnot to have accompanying CNS involvement. These

    patients demonstrate a high rate of late recurrence andneed long-term follow up. Although recurrences may

    occur, they respond to repeat dosing of oral cortico-steroids and good VA can be maintained.

    Key words: sarcoidosis, choroidal granuloma, uve-

    itis, choroid, steroids.

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    47CHOROIDAL GRANULOMAS IN SYSTEMIC SARCOIDOSIS DESAI ET AL