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Produced: 10/30/2025 7:46 PM
Question 20150036
Inquiry Details
References:
Subject matter expert
Question:
Reportability/MP/H--Kidney: "Multilocular clear cell renal cell carcinoma." Would this be coded 8310? See discussion.
Discussion:
Multilocular clear cell renal cell carcinoma is a specifc histologic type listed in the CAP cancer protocol for kidney, but not in the ICD-O-3 and it is not on the list of specific types of renal cell carcinomas in Table 1 of the kidney equivalent terms and definitions in the MP/H manual. There is a malignant multilocular cystic nephroma 8959 in Table 1, but I can't tell if this the same histology as what is stated in this path report.
Answer:
Apply Kidney rule H5 and code the clear cell (8310/3) which is the specific type of renal cell. Multilocular is a variant of clear cell which is a variant of renal cell carcinoma. As of yet, no new ICD-O morphology code as been proposed for this specific histology. It will be addressed in the revised rules.
