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Produced: 11/23/2024 11:33 PM
Question 20091009
Inquiry Details
References:
ICD-O-3
Question:
MP/H Rules/Histology--Kidney: How do you code histology for a renal cell carcinoma when pathologists disagree as to whether or not the tumor is consistent with thyroid-like follicular carcinoma of the kidney? See Discussion.
Discussion:
Final diagnosis states 'left radical nephrectomy, renal cell carcinoma.' The CAP Histologic Type is listed as: Unclassified, most consistent with primary thyroid-like follicular carcinoma of the kidney.' Because of the unusual histology it was sent for a consult to a genitourinary pathology specialist. His response was: 'histologic features not typical for any of the known subtypes of renal cell carcinoma and are not consistent with primary thyroid-like follicular carcinoma of the kidney, a distinct renal tumor that we have recently published in the literature.' The tumor was TTF-1 negative, arguing against metastasis from a thyroid primary.
Answer:
For cases diagnosed 2007 or later, assign code 8312 [renal cell carcinoma, NOS]. The diagnosis is renal cell carcinoma, but the specific type is in question.
Cancer Site Category:
Kidney, renal pelvis
Data Item Category:
Histology
Other Category:
N/A
Year:
2009
