Histology Course S XII 2 Department of Pathology, University of Zurich Histology Course

S XII 2 nevocytic nevus, compound type, of the skin HE further information (German) on HiPaKu
  ICD-10: D22.9; ICD-O: 8760/0

23-year-old patient with pigmentation on right shoulder.

Macroscopically: skin spindle with central, well demarcated, elevated, homogenous dark brown lesion, 0.5 cm in diameter

- Symmetrical neoplasia with sharp demarcation of the edges
- The epidermis has a slightly verruccal aspect.
- Note the junctional and dermal cell nests
- Evidence of melanin
- No marked cell or nuclear polymorphism, unremarkable nuclei, no elevated mitotic activity
- The neoplasia shows maturation with increasing depth (cell nests and cells grow smaller)