SEER Inquiry System - Question 20110079 Details

System Guide

Back to Search Results

SEER Inquiry System - Report

Produced: 10/07/2026 10:34 AM

Question 20110079

Export CSV Export PDF Print

Add to Report

Inquiry Details

References:

2007 MP/H Rules

Question:

MP/H Rules/Histology: In the MP/H Manual, where is the documentation indicating "focal" is not a term that can be used to code histology? See Discussion.

Discussion:

Example: neuroendocrine carcinoma with focal squamous differentiation.

Answer:

For the purposes of the MP/H rules, the term "focal" is not used to indicate a more specific histology. Terms that may be used to indicate a more specific histology are listed in the relevant histology rules. For example, see Breast histology rule H3. Notice the terms listed in the note for this rule are "type, subtype, predominantly, with features of, major, with ___ differentiation, architecture or pattern." The term "focal" is not included. This concept will be clarified in future revisions to MP/H rules.

Cancer Site Category:

N/A

Data Item Category:

Histology

Other Category:

N/A

Year:

2011