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SEER Inquiry System - Report
Produced: 11/06/2025 8:28 PM
Question 20081016
Inquiry Details
References:
2007 SEER Manual, 73
Question:
Laterality--Brain and CNS: When a meningioma extends to both right and left sides, is laterality coded 4 for bilateral or 9 for midline? See Discussion.
Discussion:
Operative Findings: Bilateral frontal craniotomies for excision of giant meningioma which extended onto optic chiasm.
Path: Bifrontal tumor, 6.5 cm meningotheliomatous meningioma.
Answer:
If it is not possible to determine whether the meningioma originated on the left or the right, assign code 4 [Bilateral involvement, lateral origin unknown; stated to be single primary].
Cancer Site Category:
Brain and CNS
Data Item Category:
Laterality
Other Category:
N/A
Year:
2008
