Thyroid paraganglioma. Report of 3 cases and description of an immunohistochemical profile useful in the differential diagnosis with medullary thyroid carcinoma, based on complementary DNA array results.

Thyroid paraganglioma is a rare disorder that sometimes poses problems in differential diagnosis with medullary thyroid carcinoma. So far, differential diagnosis is solved with the help of some markers that are frequently expressed in medullary thyroid carcinoma (thyroid transcription factor 1, calcitonin, and carcinoembryonic antigen). However, some of these markers are not absolutely specific of medullary thyroid carcinoma and may be expressed in other tumors.

Imiquimod in mycosis fungoides.

Imiquimod is a topically active imidazoquinoline immunomodulator agent. It works as an indirect antiviral and antitumoral and stimulates the production of INF-alpha and various other cytokines. We assayed topical imiquimod in treating early stages of mycosis fungoides.

Psoriasiform eruption induced by infliximab.

Objective: To report a case of psoriasiform eruption induced by infliximab.

Case Summary: A 46-year-old woman with enterocutaneous fistula secondary to Crohn's disease developed pruriginous, erythematous, desquamative plaques on her elbows, knees, hands, and buttocks after receiving the second and third doses of intravenous infliximab. Histologic examination showed a lichenoid pattern.