SEER Inquiry System - Search

Histology--Heme & Lymphoid Neoplasms:  How should histology be coded for a pathologic diagnosis of “Follicular lymphoma, diffuse pattern grade 3A of 3, equivalent to diffuse large B cell lymphoma (germinal center cell type)” when later referenced clinically as follicular lymphoma grade 3A? See Discussion.

Solid Tumor Rules/Histology--Cervix: How is histology coded for a 2023 endocervical adenocarcinoma negative for high-risk human papilloma virus (HR-HPV) on Pap smear and strongly positive for p16 on biopsy?  See Discussion.

Histology: How is this field coded for a perivascular epithelioid cell neoplasm (PEComa) of uncertain malignant potential that is malignant based on the presence of metastases? See Discussion.

Solid Tumor Rules (2018)/Histology--Prostate: How is the histology coded for a diagnosis of mixed prostatic adenocarcinoma (5%) and small cell neuroendocrine carcinoma (95%) from a transurethral resection of the prostate? See Discussion.

Solid Tumor Rules/Histology--Penis:  Why is warty carcinoma listed in Other Sites, Table 23 (Penis and Scrotum Histologies) as 8051 when the ICD-O-3.2 and SINQ 20200003 indicate the correct histology is 8054 for this neoplasm? See Discussion.

MP/H Rules/Histology--Bladder: Is urothelial carcinoma, high-grade, predominantly solid type, coded as 8120/3 or 8230/3? See Discussion.

MP/H Rules/Histology--Lung: What is the correct histology code for this lung tumor? FINAL PATHOLOGIC DIAGNOSIS: CT-guided Rotex and Franseen needle biopsies: Positive for malignancy, consistent with adenocarcinoma. Comment: the adenocarcinoma present also shows rare CD56 staining which indicates a neuroendocrine component.

Is this a mixed histology? 8045/3? 8244/3?

MP/H Rules/Histology/Grade--Unknown & ill-defined sites: What is the correct histology and grade of a liver biopsy with metastatic neuroendocrine carcinoma low to intermediate grade if primary site is unknown? See Discussion.

Grade/Histology--Rectum: How should histology and grade be coded for high grade neuroendocrine tumor (NET) (WHO Grade 3) of the rectum? See Discussion.

2018 Solid Tumor Rules/Histology--Colon: What is the histology code of a diagnosis of well differentiated neuroendocrine tumor (NET), grade 2 of the appendix? See Discussion.