Central nervous system sarcoidosis: follow-up at MR imaging during steroid therapy.

Purpose: To document the changes observed at sequential magnetic resonance (MR) imaging of sarcoidosis lesions of the central nervous system (CNS) during treatment with corticosteroids.

Materials And Methods: The abnormalities detected in 24 patients (mean follow-up, 36 months) were compared before and after therapeutic periods (n = 75) that were divided into attack (high-dose), upkeep (decreased-dose), and minimal (low-dose) periods. Parenchymal lesions were classified as type 1 (enhanced with gadolinium), type 2 (demyelinating), or type 3 (lacunar) and were assessed as regressing, stable, or progressing.

[Abnormality of hepatic perfusion in superior vena caval obstruction syndrome. A case report diagnosed by CT scan].

We describe a case of focal and intense contrast enhancement on hepatic CT due to superior vena caval obstruction and brachiocephalic vein obstruction. This phenomenon is explained by systemic portal venous shunting.

Parenchymal neurocysticercosis: follow-up and staging by MRI.

We describe the evolution of parenchymal cerebral cysticerci on MRI, to assess signs of early cyst degeneration. We studied 15 lesions in four treated and one untreated patient. MRI was performed before therapy and repeated in the 1st month after each course of anticysticercus drugs, every 4 months during the 1st year and then annually; the follow-up period was 8-48 months.

[Postvaccination myelitis. Aspect and course followed by MRI].

We report the assessment by MRI of a case of radiculomyelitis after vaccination against tetanus-poliomyelitis. In the acute stage the appearance was an isolated myelitis of the conus medullaris with contrast enhancement. The upper thoracic cord presented central areas of high signal intensity on T2 weighted images.