Malignant transformation of eccrine tumors.

  title={Malignant transformation of eccrine tumors.},
  author={E Galadari and A H Mehregan and Kuo Chen Lee},
  journal={Journal of cutaneous pathology},
  volume={14 1},
Malignant transformation occurred in pre-existing sweat gland tumors in 7 patients. Three lesions showed an histologic pattern of eccrine spiradenoma, 2 eccrine poroma, one cylindroma and one papillary eccrine adenoma. Malignant transformation was histologically characterized by the presence of solid tumor areas populated with large cells having irregularly shaped nuclei and mitotic figures. There were multiple foci of squamous metaplasia, areas of loss of basement membrane and invasion of the… CONTINUE READING