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Question: 20130222 Status
Final

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Question
MP/H Rules/Histology--Bladder: What code should be assigned to this tumor? A single bladder tumor removed via TURB. Final Dx: Invasive urothelial carcinoma with extensive divergent differentiation including small cell carcinoma, micropapillary carcinoma, and squamous cell carcinoma features.

MP/H rules seem to lead to H8 - code the numerically higher ICD-O-3 code. Out of this diagnosis, it appears that 8131, micropapillary urothelial carcinoma would be the code. That would ignore the small cell carcinoma, which seems prognostically more significant.

Discussion


Answer
Code this combination to mixed small cell (8045) -- a combination of small cell with other types of carcinoma. There is currently no rule in the urinary site rules for this combination of histologies. This will be included in the revised MP/H rules.

History


Last Updated
12/16/2013

Date Finalized
02/05/2014