A CASE OF POROCARCINOMA

A 64-year-old woman had an ulcerated tumor of 5 years' duration on her left foot. Histological examination revealed a eccrine poroma with bowenoid changes at one edge, which had invaded the dermis. We consider this case to be malignant eccrine poroma (porocarcinoma).     

A CASE OF STORIFORM NEUROFIBROMA

A storiform neurofibroma on the back of a 23-year-old male is reported. The tumor grew slowly and continuously and with no sign of malignancy. The tumor was completely excised with no sign of recurrence in over one and one-half years of follow-up. The characteristic mat-like structure and the presence of melanin in the cytoplasm of the tumor cells suggest that the tumor is of the melanotic type.     

A CASE OF CUTANEOUS PLASMACYTOSIS

A sixty-six-year-old woman has had numerous macules all over her body for a year without any systemic involvements. Plasma cells had infiltrated into the dermis and perivascular region, but showed no mitotic figures nor atypicalities. Laboratory examinations for Bence Jones protein, serum gammaglobulin, and immunoglobulins demonstrated no abnormal findings. The surface markers of the plasma cells were polyclonal; they were stained by anti IgA, IgG, IgM, kappa, and lambda. We consider this case not to be one of a true tumor but one of rather benign reactive proliferation of plasma cells in the skin, although its etiology is unclear.