SEER Inquiry System - Question 20081115 Details

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Question 20081115

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Inquiry Details

References:

2007 SEER Manual, C-931. Appendix C

Question:

CS Extension--Brain and CNS: How is this field coded for a malignant tumor presenting as a confluent lesion over right parietal, posterior frontal and thalamic regions?

Discussion:

Answer:

This answer was provided in the context of CSv1 coding guidelines. The response may not be used after your registry database has been converted to CSv2.

Assign CS extension code 40 [Tumor crosses the midline; Tumor involves contralateral hemisphere; Tumor involves corpus callosum (including splenium)]

The thalamus is located between the corpus callosum and the cerebellum and brain stem. A supratentorial tumor extending to the thalamus involves the corpus callosum (extension code 40) but has not yet reached the cerebellum or brain stem. Code 40 applies, but code 50 or any higher code is not applicable in this case.

Cancer Site Category:

Brain and CNS

Data Item Category:

N/A

Other Category:

N/A

Year:

2008