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SEER Inquiry System - Report
Produced: 05/11/2026 10:09 AM
Question 20240075
Inquiry Details
References:
#1: 2024 SEER Manual, 13-14. Reportability
#2: WHO Class Breast Tumors, online version. 5th edition
Question:
2024 SEER Manual/Reportability--Breast: Is "lobular intraepithelial neoplasia" (LIN) a glandular intraepithelial neoplasia? If so, is lobular neoplasia II (LN II)/LIN II non-reportable, similar to PanIN II - SINQ 20240026? See Discussion.
Discussion:
The Reportable Diagnosis List indicates "Lobular neoplasia grade II (LN II)/lobular intraepithelial neoplasia grade II (LIN II) breast (C500-C509)" is reportable.
The ICD-O-3.2 lists “Glandular intraepithelial neoplasia, grade II” and “Glandular intraepithelial neoplasia, low grade” as histology code 8148 with behavior of /0 (benign).
Answer:
Report LN II and LN III along with LIN II and LIN III and assign code 8520/2.
WHO Classification of Breast Tumors, 5th edition, lists lobular neoplasia as acceptable, related terminology for lobular carcinoma in situ.
