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SEER Inquiry System - Report
Produced: 08/14/2025 6:13 AM
Question 20240053
Inquiry Details
References:
#1: Solid Tumor Rules. Kidney, 2024 Update
#2: WHO Class Urinary Tumors. 4th and 5th editions
Question:
Reportability/Behavior--Kidney: Is a 2022 diagnosis of “clear cell renal cell papillary tumor” on nephrectomy reportable? See Discussion.
Discussion:
We are aware that the WHO 4th edition for urinary tumors has changed the behavior of “clear cell papillary renal cell carcinoma” to /1 but registries are to continue collecting as /3.
While the diagnosis in our case is stated as “tumor” it does seem like the pathologist may be using the new WHO terminology of “tumor” rather than “carcinoma,” so we are not sure if behavior is /3 or /1.
Answer:
Report clear cell renal cell papillary tumor (CCRCPT), formerly classified as clear cell renal cell papillary carcinoma, and assign code 8323/3 until this new term and code (8323/1) have been adopted by standard setters.
The Kidney Solid Tumor Rules advise to code clear cell papillary renal cell carcinoma as 8323/3. WHO Classification of Tumors of the Urinary System and Male Genital Organs, 4th ed., has reclassified this histology as a /1. This change has not yet been implemented and it remains reportable.
WHO Classification of Urinary and Male Genital Tumors, 5th ed., has since reclassified clear cell papillary renal cell carcinoma as CCRCPT (8323/1). The name change was made because there have been no reports of metastatic events for this indolent tumor. The term clear cell renal cell papillary carcinoma is no longer recommended.
