患者男,85岁。背部淡红色结节2年,不痛不痒,皮损逐渐增大,中央反复破溃。皮损组织病理示:与表皮相连的瘤细胞团呈宽幅度向真皮深层增殖,瘤体内可见囊腔及导管样结构,瘤细胞稍小于棘细胞,立方形,可见细胞间桥,核仁明显,未见明显核分裂相。诊断:小汗腺汗孔瘤。 Male patient, 85 years old. Pink nodules on the back for 2 years, itching, skin lesions gradually increased, the central repeated ulceration. Histopathological examination showed that the tumor cell mass connected with the epidermis showed a wide range of proliferation to the deep dermis. The cyst and duct-like structures were visible in the tumor. The tumor cells were slightly smaller than the spine cells and cubes, showing intercellular bridges and obvious nucleoli. No obvious mitotic phase. Diagnosis: Small sweat gland sweat.