SEER Inquiry System - Search

Solid Tumor Rules/Histology--Head & Neck: What is the histology of human papillomavirus (HPV)--associated multiphenotypic carcinoma? See Discussion.

MP/H Rules/Histology--Bladder: What is the correct histology code for a diagnosis of urothelial plasmacytoma carcinoma of the bladder per pathology report?

Histology/Biliary tract--Ampulla of Vater: What is the histology code for Intra ampullary papillary-tubular neoplasm in association with microinvasion? See discussion.

Solid Tumor Rules (2018/2021)/Histology--Breast:  How is histology coded for a diagnosis of invasive mammary neuroendocrine tumor (NET), grade 2/3? See Discussion.

MP/H Rules/Histology--Thyroid: How should histology be coded for a thyroidectomy final diagnosis of papillary thyroid carcinoma, favor cribriform-morula variant? See Discussion.

MP/H Rules/Histology--Thyroid: What is the correct histology when final diagnosis of a thyroidectomy includes the descriptor "papillary and follicular architecture?" See Discussion.

Histology--Corpus uteri: Is 8020/3 used for a predominantly dedifferentiated carcinoma with focal well-differentiated endometrioid adenocarcinoma diagnosed in 2018? See Discussion.

Solid Tumor Rules/Histology--Ovary:  How is histology coded for an ovary case with a diagnosis of “high grade papillary serous carcinoma” in 2023? This term is not in the Solid Tumor Rules and ICD-O 3.2 updates. Is “high grade papillary serous carcinoma” equivalent to “high grade serous carcinoma” (8461) or to “papillary serous adenocarcinoma” (8441) with high grade captured only in the Grade fields, or is there another more appropriate code?

MP/H Rules/Histology--Head & Neck: How is the histology coded for a mammary analogue secretory carcinoma (MASC) of the parotid gland? See Discussion.