Cutaneous Histiocytic Sarcoma With Cellular Cannibalism.

Cutaneous histiocytic sarcoma (HS) is a rare malignant tumor. An 82-year-old woman presented with a 4 × 2-cm irregular-shaped red nodule on the left posterior scalp. A biopsy specimen revealed sheets of pleomorphic atypical cells in the dermis and subcutis.

A retrospective observational study on biological drug treatment in a daily practice serving patients with psoriasis in Japan.

Background: In Japan, more than five years have passed since emergence of the first three biologics, infliximab, adalimumab, and ustekinumab, became available in daily practice; however, no data for drug survival was reported from Japan.

Objective: To study the long-term drug survival of infliximab, adalimumab, and ustekinumab used for Japanese psoriatic patients.

Methods: We retrieved data on all patients treated with biological agents and calculated the long-term drug survival for infliximab, adalimumab, and ustekinumab using our psoriasis registry (Kurume Psoriasis Registry: KURUPR) consisted of 343 patients by the end of March 2017.

Angiotropic syringomatous carcinoma.

Syringomatous carcinoma (SC) is a slow-growing malignant skin tumor that usually affects the face or scalp. An 83-year-old female developed SC on the sole, a rare location. Histopathologically, numerous ducts with few keratinizing cysts were seen in the upper dermis, and cords, strands and nests with sclerotic stroma were seen in the deep dermis and subcutis.