SEER Inquiry System - Question 20041095 Details

System Guide

Back to Search Results

SEER Inquiry System - Report

Produced: 09/13/2025 11:25 AM

Question 20041095

Export CSV Export PDF Print

Add to Report

Inquiry Details

References:

ICD-O-3

Question:

Primary site: How is this field coded for a malignancy described as a "intracranial squamous cell carcinoma (8070) arising in a previous epidermoid cyst"? See Discussion.

Discussion:

4-5-02 MRI Brain: Enhancing mass is probably a recurrence of the original tumor resected in 1983 (benign). 4-8-02 Gross resection. Lesion was coming up against her brain stem: Removed it grossly.

Path: 4-8-02 Brain tumor, left temporal: SCC arising from a previous epidermoid cyst of the brain. XRT began 4-25-02.

Path states: "Squamous lesions suspicious for malignant transformation of old epidermal cyst (1983). It has been reported in literature that epidermoid cysts in the brain can undergo a malignant transformation which is what happened in this case."

It appears the patient has an intracranial epidermoid cyst that is now

giving rise to SCC. Squamous cell carcinoma (8070) of the brain (C71_) fails the edit Primary Site, Morphology-Imposs ICDO3 (SEER IF38).

Answer:

Code the primary site to C760 [Ill-defined site; Head, face or neck, NOS]. There is an intracranial malignancy arising from a previously resected epidermoid cyst. Squamous cell carcinoma, primary of the brain, is a non-overridable edit error.

Cancer Site Category:

N/A

Data Item Category:

Primary site

Other Category:

N/A

Year:

2004