SEER Inquiry System - Search

Update to current manual/First course treatment--Neoadjuvant treatment: How are the 2021 neoadjuvant therapy fields coded when neoadjuvant therapy and surgery were part of first course plans but treatment was never completed. See Discussion.

Histology--Brain and CNS: What is the histology code of a primary papillary epithelial tumor of the sella (PPETS)?  See Discussion.

Solid Tumor Rules/Histology: When should the designation of “poorly differentiated” be used to further specify histology for carcinoma, NOS (8010) as undifferentiated carcinoma (8020)? See Discussion.

Solid Tumor Rules (2018/2021)/Histology--Head & Neck:  What is the histology code for a uvula (C052) primary with histology of squamous cell carcinoma, conventional (keratinizing) and p16 result is negative? See Discussion.

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.