Pathology

Eccrine poroma has the following pathological features:

• tumour cells:
  • irregular accumulations within vascular stroma
  • tends to extend from epidermis into dermis
  • epidermal basaloid structure
  • characteristically, filled with glycogen and glycolytic enzymes
• crossed by ducts:
  • numerous and tortuous
  • lysosome within cell
• often superficial hyperkeratosis

Reference

1. Sawaya, J.L.; Khachemoune, A. Poroma: A review of eccrine, apocrine, and malignant forms. Int. J. Dermatol. 2014. 53, 1053–1061