congenital anomalies of pituitary gland
DESCRIPTION
Congenital anomalies of pituitary gland. Anatomy description with few MRI picture taken from trusted website. pharyngeal hypophysis, duplication of pituitary gland, agenesis, craniopharygioma, ectopic posterior pituitary glandTRANSCRIPT
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CONGENITAL ANOMALIES OF PITUITARY GLAND
MARYAM JAMILAH BINTI ABDUL HAMID082013100002
IMS BANGALORE
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LEARNING OUTCOME
• List down the possible congenital anomalies of pituitary gland
• Explain the malformation of these congenital anomalies
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INTRODUCTIONLobes:-anterior lobe-posterior lobe
Anterior lobe :Outpocketing of ectodermal of Rathke’s pouch
Posterior lobe :Downward extension of the diencephalon
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Possible congenital anomalies
• Ectopic posterior pituitary
• Pharyngeal hypophysis
• Agenesis/Hypogenesis of pituitary gland
• Duplication of pituitary gland
• Congenital tumor of the gland
(Craniopharyngioma)
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1) Ectopic posterior pituitary
An absent normal posterior pituitary brightspot within the sella with ectopic bright signal atanother site (such as the median eminence) ona weighted magnetic resonance
Development:Incomplete caudal extension of thediencephalon during embryogenesis
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Effect:Pituitary dwarfismLack of growth hormone
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2) Pharyngeal hypophysis
Development:-A remnant of the stalk of the hypophysialdiverticulum in the roof of the oropharynx
Pharyngeal hypophysis
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3) Agenesis/Hypogenesis of pituitary gland
Development:
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Effect:
Absence of the gland is incompatible with life,
i.e. it leads to death of the infant
Hypogenesis of pituitary gland: It leads to
panhypopituitarism
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4) Duplication of pituitary gland
Development:-Fewer than 40 cases since 1880-A rare craniofacial developmental anomalyoccurring during blastogenesis.
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5) Congenital tumor of the gland(Craniopharyngioma)
Development:A tumor arises from a remnant of Rathke'spouch. *
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Effect:
• Increasing the intracranial pressure;
hydrocephalus
• Disrupting the function of the pituitary gland
• Damaging the optic nerve
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REFERENCES
• Embryology IB Singh• Embryology Langman• https://www.inkling.com/read/the-developing-h
uman-moore-9th/chapter-17/pharyngeal-hypophysis-and
• http://www.surgicalneurologyint.com/article.asp?issn=2152-7806;year=2012;volume=3;issue=1;spage=23;epage=23;aulast=Manjila
• http://www.dundee.ac.uk/medther/tayendoweb/craniopharyngioma.htm
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THANK YOU