Case 41 - Discussion


 

 

Eccrine Poroma

 
 
Clinical Futures
 
Gross Findings
 
Microscopic Findings
 
Subtypes
 
  • Intraepidermal poroma (historically known as hidroacanthoma simplex) represents a form of poroma in which nests of cells with tubular differentiation are confined to the surface epidermis, with no evidence of dermal involvement. This pattern of poromas can sometimes cause confusion with other entities that may exhibit an intraepidermal pattern of growth, including seborrheic keratosis and melanocytic neoplasms.
  • Juxtaepidermal poroma refers to a pattern of poroma in which nests and thick cords of cells are in continuity with the epidermis but also involve the superficial dermis. The intervening stroma is highly vascularized, as described above.
  • Dermal poroma (historically referred to as dermal duct tumor) represents a pattern of poroma confined wholly to the dermis. Some intradermal poromas have relatively little stroma, while others display the highly vascularized stroma that is typical of superficial poromas.
Reference
  http://tray.dermatology.uiowa.edu/DIB/EccPor-01.htm
  http://www.emedicine.com/derm/topic112.htm