Abstract

A 52-year-old male patient with adenocarcinoma on the lower abdomen is reported. The tumor had occurred 10 years previously followed by a new nodule next to it, a year ago. The surface of the original tumor is papillomatous, flatly-raised in shape, and the color is brown, while the surface of the new nodule is smooth, hemispheric in shape, and the color is red. He also had metastatic lesions of bilateral inguinal, iliac, and paraaortic lymph nodes. Survey of internal organs did not disclose any malignant lesions and the resection of the tumors and the dissection of the lymph nodes were performed.
Histologically, numerous nests of tumor cells were found in the dermis with a small number of the tumor cells in the epidermis. Furthermore, the Indian filing of tumor cells was found occasionally in the dermis. The inflammatory cells around the tumor nests were scarcely.
The metastatic adenocarcinoma was suspected from the histological findings. However, we concluded that this tumor was cutaneous origin, probably apoeccrine gland origin, mainly due to the long clinical course and the lack of internal malignancies.