Renal carcinoma--unusual presentation and angiographic findings.

A case of papillary renal cell carcinoma with clinical and angiographic features of an abscess is reported. Papillary renal carcinomas constitute 14% of renal adenocarcinomas. These tumors have slower growth rate and better prognosis.

Mediastinal lymphangioma.

Mediastinal lymphangioma is an uncommon benign tumor accounting for 0.7 to 4.5% of all mediastinal masses. Lymphangiomas consist of dilated cystic lymph spaces lined by single layers of endothelium and do not undergo malignant change. Most mediastinal lymphangiomas are asymptomatic. There are no specific radiological findings. Surgical excision is the treatment of choice and the prognosis is excellent.

Renal carbuncle: simulation of tumor response to epinephrine.

A case of renal carbuncle with unusual angiographic findings is presented. The abscess showed abnormal vessels on selective angiogrpahy which were enhanced after intra-arterial epinephrine. New foci of abnormal vessels were also seen on the postepinephrine angiogram.