Histology Course A II 8 Department of Pathology, University of Zurich Histology Course

A II 8 malignant melanoma of skin HE further information (German) on HiPaKu 
  ICD-10: C43; ICD-O: 8720/3
Female, 46 y., irregular pigmented, growing, slightly bleeding and itching skin tumor on the thigh. skin excision including normal skin on both sides
- atypical, partially large cells in the epidermis and the papillary dermis, partially in nests
- deeply invasive growth with destruction of skin adnexae
- pagetoid growth in upper epidermal layers; ulceration
- polymorphous and hyperchromatic nuclei with prominent nucleoli
- mitotic figures
- groups of pigmented tumor cells with intracytoplasmatic deposits of coarse and dusty brown melanin pigment (amelanotic melanomas are devoid of melanin pigment)
- inflammatory infiltrate consisting of lymphocytes and plasma cells
This is a nodular melanoma, thickness at least 3mm.
The melanoma has been completely excised. Compare samples: A IV 29, A IV 30