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We describe a Japanese patient with cutaneous plasmacytosis whose clinical course we observed for 5 years. We also review 26 patients with this condition, including 24 Japanese and two non-Japanese, reported in detail. This review revealed that this condition has characteristic clinical and pathologic features and should be considered a distinct clinical entity. The reason for the predominant occurrence of cutaneous plasmacytosis in Japanese patients is unknown.

Adult T-cell leukemia/lymphoma (ATLL) often involves the skin. Cases with skin lesions without either leukemic nor lymph node involvement have been categorized into a cutaneous type. While the clinical manifestations of the cutaneous-type ATLL are variable, including multiple papules, nodules, plaques, or erythroderma, a solitary skin nodule alone is rare, and only 2 cases have been reported in the literature. We present a 58-year-old Japanese patient with cutaneous-type ATLL that presented as a large, solitary skin nodule as the sole clinical feature. The skin tumor was completely resolved after treatment with x-ray and electron beam irradiation.

Elastofibroma is an uncommon fibroelastic tumor or tumorlike process that usually occurs between the scapula and the chest wall of elderly patients. This condition is rarely reported in the dermatologic literature, because it infrequently arises in the skin or within the subcutaneous tissue. We present a 78-year-old man with 15 separate subcutaneous nodules on the buttocks and upper extremities together with bilateral subscapular nodules. All specimens taken from different lesions were histologically confirmed as elastofibromas. As far as we know, this case with 17 distinct elastofibromas demonstrates the largest number ever reported in a single patient. Although the pathomechanism of the occurrence of multiple elastofibromas is unknown, it should be included in the differential diagnosis of multiple subcutaneous nodules.

We describe an unusual case of hidradenoma papilliferum on the chest of a man and discuss the rare sites of the tumor.