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Morphology & Grade

ICD-O-3 Morphology Codes

For diagnostic terms in the pathology report that are not listed below, please refer to your ICD-O-3 manual.

Malignant Melanoma, NOS (8720/3)

Malignant Melanoma in Precancerous Melanosis (8741/3)

Mucosal Lentiginous Melanoma (8746/3)

Nodular Melanoma (8721/3) - Nodular melanoma represents about 15% of all melanomas.

Balloon Cell Melanoma (8722/3)

Malignant Melanoma, Regressing (8723/3)

Amelanotic Melanoma (8730/3) - Amelanotic melanoma is rare and is challenging to diagnose because there is an absence of pigmentation.

Malignant Melanoma in Junctional Nevus (8740/3)

Lentigo Maligna Melanoma (8742/3) - Lentigo maligna melanoma accounts for approximately 5% of melanomas.

Superficial Spreading Melanoma (8743/3) - Superficial spreading melanoma is the most common type of melanoma, representing approximately 70% of all melanomas.

Acral Lentiginous Melanoma (8744/3) - Acral lentiginous melanoma represents approximately 8% of all melanomas and is the most common melanoma in dark-skinned people.

Desmoplastic Melanoma (8745/3) - Desmoplastic melanoma is rare, representing approximately 1.7% of all melanomas.

Malignant Melanoma in a Giant Pigmented Nevus (8761/3)

Synonyms for in situ melanoma: noninvasive, intraepithelial, Clark's level 1, basement membrane of epidermis is intact, stage "Tis".