Spiradenocylindrocarcinoma: a malignant hybrid tumor.

Background: Eccrine spiradenomas and cylindromas are benign, slowly growing, cutaneous adnexal neoplasms, recently hypothesized to arise from a common pluripotential cell; malignant variants are rare. We found 48 cases of malignant spiradenomas and 33 cases of malignant cylindromas reported in the English literature. Benign tumors demonstrating both spiradenomatous and cylindromatous features have been infrequently reported.

Cardiac catheterization-induced acute radiation dermatitis presenting as a fixed drug eruption.

Acute radiation dermatitis is an uncommon complication of fluoroscopic procedures. Cases secondary to cardiac catheterization are infrequently reported in the literature. The risk of developing this reaction is directly related to the skin dose of radiation, which is affected by the type of procedure, the technique used to achieve appropriate penetration, the duration of exposure, and the patient's body habitus.