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SEER Inquiry System - Report
Produced: 06/27/2026 1:32 PM
Question 20091100
Inquiry Details
References:
#1: 2007 SEER Manual, C-559, C-563, C-567. Appendix C
#2: ICD-O-3
Question:
MP/H Rules/Histology--Melanoma: How is histology coded for a "melanoma in situ, lentiginous type," arising in the skin of the lower leg? See Discussion.
Discussion:
In researching this, acral lentiginous melanoma is observed on the palms, soles and under the nails. To code to 8744, do we specifically have to see the word "acral" lentiginous melanoma?
Answer:
For cases diagnosed 2007 to 2020
Assign 8742/2 [lentigo maligna] to "melanoma in situ, lentiginous type."
Acral lentiginous melanoma is not the same as melanoma, lentiginous type. "Acral lentiginous melanoma," 8744, should be used only if the report states acral lentiginous melanoma or malignant melanoma, acral lentiginous type.
Acral lentiginous melanoma most often occurs on the soles of the feet or the palms of the hands.
