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Produced: 01/23/2025 1:50 AM
Question 20071016
Inquiry Details
References:
2007 MP/H Rules. Urinary (M6, M7)
Question:
MP/H Rules/Multiple Primaries--Bladder: The new multiple primary rule M7 states that tumors diagnosed more than three years apart are multiple primaries. Does this apply to in situ bladder tumors that occur more than three years apart and to an in situ tumor that occurs three years after an invasive tumor?
Discussion:
Answer:
For cases diagnosed 2007 or later, use the MP/H rules in order. Rule M6 comes before rule M7.
M6 states that bladder tumors with certain histologies are a single primary. It is a single primary regardless of timing if there is any combination of:
- papillary carcinoma [8050]
Rule M7 applies to bladder tumors with histologies other than those listed above. If you have such a case, rule M7 applies to in-situ tumors and to an in situ three years after an invasive.
Cancer Site Category:
Bladder
Data Item Category:
N/A
Other Category:
Multiple primaries
Year:
2007
