MR imaging of myotendinous strain.

Myotendinous strain predominantly exhibits pathognomonic MR features. Whenever a patient's musculoskeletal symptoms lack temporal correlation with exercise, MR imaging may be valuable in distinguishing strain injury from other disorders of the myotendinous unit. Compared with myotendinous strain, myositis ossificans has variable and nonspecific MR appearances that may simulate neoplasm and require biopsy for diagnosis.

Posterior fossa epithelial cyst: case report and review of the literature.

A 49-year old woman with progressive cranial nerve signs and hemiparesis was found at MR imaging and at surgery to have a cyst at the foramen magnum. Immunohistochemistry and electron microscopy showed an epithelial cyst of endodermal origin. MR findings were of an extraaxial mass, with short T1 and T2 times.

Aortotracheal fistula: demonstration by computerized tomography.

Aortotracheal fistula is a rare condition that is invariably fatal if not diagnosed and surgically treated. Patients usually present with small intermittent haemoptysis. In cases of aortotracheal fistula bronchoscopy may be both misleading and dangerous.

Bile duct hamartoma occurring in association with long-term treatment with danazol.

We report a case of bile duct hamartoma which developed in a patient who had been on long-term danazol treatment. Such patients should be under close follow-up, preferably with periodic ultrasound examination of the liver. If the patient develops a liver mass, because of non-specific clinical features and imaging appearances, biopsy may be the only way to achieve a definitive diagnosis.