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Search: Organ site Search: Tumor / Syndrome
WHO Classification of Tumours
Melanoma, NOS


A malignant, usually aggressive tumor composed of atypical, neoplastic melanocytes. Cutaneous melanomas may arise from acquired or congenital melanocytic or dysplastic nevi. Melanomas frequently metastasize to lymph nodes, liver, lungs, and brain.

Histologic subtypes of malignant melanoma include:
Superficial spreading melanoma
Nodular melanoma
Acral lentiginous melanoma
Lentigo maligna melanoma