Case report: volvulus of a mesenteric cyst--an unusual complication diagnosed by CT.

A 10-year-old girl presented with colicky abdominal pain and a vague left sided mass on physical examination. Plain radiographs of the abdomen were unremarkable but ultrasound examination demonstrated a large right sided unilocular cystic abdominal mass. Computed tomographic features were diagnostic of volvulus of the proximal small bowel with associated mesenteric cyst. Surgery confirmed CT findings and no mid gut malrotation was noted at operation.

The prognostic importance of CT features in primary intracranial lymphoma.

The correlation of computerized tomography (CT) features with survival of 28 patients with primary intracranial lymphoma was analysed retrospectively. Severe perifocal oedema, periventricular tumours and lesions which were non-homogenously enhancing or non-enhancing were found to be associated with a poor prognosis. The prognosis when multiple lesions were present was almost the same as that of a solitary lesion (p = 0.95). Ring enhancing lesions had considerably longer survival. Lesions in the frontal region and those close to the meninges, enhancing homogeneously, had a better prognosis.

Combined nuclear and digital subtraction contrast arthrography in painful knee prosthesis.

The evaluation of a painful knee prosthesis remains a difficult problem for both orthopaedic surgeons and radiologists. We have compared digital subtraction arthrography with nuclear arthrography in 7 patients with a painful knee prosthesis. Three patients showed a loose tibial component, demonstrated by both digital subtraction and nuclear arthrography. All 3 underwent revision of their prosthesis. One patient had an equivocal digital subtraction arthrogram and negative nuclear arthrogram, while both studies were negative in the 3 remaining patients. Nuclear arthrography is a simple procedure and can provide useful additional information when combined with digital subtraction arthrography.