Poroma
LEGEND
Adnexal tumor with eccrine differentiation (originating from the outer layer of the acrosyringium)
Sweat gland ducts showing eccrine differentiation
Positive for EMA (epithelial membrane antigen) and CEA (carcinoembryonic antigen)
Tumor connected to the epidermis
Collection of poroid cells extending downward into the dermis as columns that eventually anastomose
Poroma
LEGEND
- Collection of poroid cells extending downward into the dermis as columns that eventually anastomose
Poroma
LEGEND
- Clear demarcation between keratinocytes and poroid cells
Poroid cells are small, bluish, oval-shaped, monotonous, and uniform
The size of poroid cells is smaller than keratinocytes, with less abundant cytoplasm
Poroma
Poroid cells are small, bluish, oval-shaped, monotonous, and uniform
Their size is smaller than that of keratinocytes, with less abundant cytoplasm
Poroid cells – high magnification
