29 Cystic Mediastinal Masses on Computed Tomography

CLINICAL IMAGAGINGAN ATLAS OF DIFFERENTIAL DAIGNOSIS

EISENBERG

DR. Muhammad Bin Zulfiqar PGR-FCPS III SIMS/SHL

• Fig C 29-1 Bronchogenic cyst. (A) Contrast CT scan shows a smooth mass with uniform water intensity and an imperceptible wall. (B) In another patient, coronal T1-weighted MR image shows a cyst with high-signal-intensity contents (arrow).61

• Fig C 29-2 Duplication cyst of the esophagus. Contrast CT scan shows a thin-walled cyst of water attenuation (arrow) adjacent to the esophagus.61

• Fig C 29-3 Pericardial cyst. Contrast CT scan shows a thin-walled cyst of water attenuation (arrow).61

• Fig C 29-4 Lateral thoracic meningocele. CT scan shows a low-attenuation mass protruding from the enlarged left intervertebral foramen.61

• Fig C 29-5 Lymphangioma. Contrast CT scan shows a low-attenuation mass (arrow) that extends to all mediastinal compartments.61

• Fig C 29-6 Thymic cyst. Sagittal T1-weighted MR image shows a cyst of low-signal attenuation (arrow) in a thymic location.61

• Fig C 29-7 Mature cystic teratoma. Contrast CT scan shows a heterogeneous anterior mediastinal mass with areas of fat (long arrow), calcification (short arrow), fluid attenuation, and thin soft-tissue septa.61

• Fig C 29-8 Cystic thymoma. Contrast CT scan shows a thin-walled cystic lesion of water attenuation in a patient with a 2-month history of myasthenia.61

• Fig C 29-9 Cystic schwannoma. Contrast CT scan shows a thin-walled mass of low attenuation in the paravertebral region.61

• Fig C 29-10 Pancreatic pseudocyst. Contrast CT scan shows bilateral pleural effusions and a thin-walled periaortic cystic lesion that displaces the esophagus (arrow) anteriorly.61