SEER Inquiry System - Question 20071009 Details

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Produced: 05/06/2026 12:30 AM

Question 20071009

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Inquiry Details

References:

2007 SEER Manual, 10. Rule 4

Question:

MP/H Rules/Multiple Primaries/Laterality--Brain and CNS: How many primaries are to be abstracted and how is laterality to be coded for two meningiomas, one occurring at the midline and the other in the right termporal region? See Discussion.

Discussion:

MRI of the brain shows two meningiomas: One is stated to be 'midline' (laterality code 9) and one is stated to be in the 'right' temporal region. The rules state if same site (C700), same histology & laterality is same side or one side unknown, then abstract as single primary. Based on this, the MRI findings would be one primary, but how should laterality be coded?

Answer:

For cases diagnosed 2007 or later, abstract two primaries. The lateralities of both meningiomas are known. Right (code 1) and midline (code 9) are different lateralities.

History:

For cases diagnosed prior to January 2007:

Abstract two primaries. The lateralities of both meningiomas are known. Right (code 1) and midline (code 9) are different lateralities.

Reference: 2004 SEER Manual, pg 19, Rule 4

Cancer Site Category:

Brain and CNS

Data Item Category:

N/A

Other Category:

Multiple primaries

Year:

2007