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Produced: 07/11/2025 10:34 PM
Question 20230079
Inquiry Details
References:
#1: ICD-O-3.2. 2021 Update
#2: Solid Tumor Rules. Cutaneous Melanoma; 2023 Update
Question:
Solid Tumor Rules/Histology--Cutaneous Melanoma: How is histology coded for a 2023 diagnosis of “early lentiginous melanoma in situ” of the skin? See Discussion.
Discussion:
Previous SINQ 20091100 has a similar scenario and the instruction was to code as lentigo maligna (8742/2); however, it does not appear to be applicable to cases diagnosed after 2020.
The WHO Blue Book does not list melanoma, lentiginous type or lentiginous melanoma in situ as an alternate term for lentigo maligna and neither do the STR or the ICD-O-3.2.
Answer:
Assign code 8742/2 (lentigo maligna) for “early lentiginous melanoma in situ.” ICD-O-3.2 lists the preferred term for 8742/2 as lentigo maligna (C44._).
Cancer Site Category:
Melanoma, Skin
Data Item Category:
Histology
Other Category:
Solid Tumor Rules (2018, 2021)
Year:
2023
