SEER Inquiry System - Search

Solid Tumor Rules/Histology--Prostate: Is histology coded as 8045 (Combined small cell carcinoma) for a 2023 diagnosis of two-component carcinoma comprised of both acinar adenocarcinoma and small cell neuroendocrine carcinoma of the prostate? See Discussion.

Histology/Diagnostic confirmation--Heme & Lymphoid Neoplams: Would you code the NOS term when follicular lymphoma is favored? What would diagnostic confirmation be coded if a positive fine needle aspirate (FNA) is followed by a positive flow cytometry (ambiguous term)? See Discussion.

Solid Tumor Rules (2018/2021)/Histology--Lung:  Should there be an exception to the Solid Tumor Rules for Lung to allow coding a more specific histology described by ambiguous terminology, when the only pathologic workup done is a cytology report?  Due to the unique nature of lung cases which are often diagnosed on imaging and cytology without more definitive pathology, we are seeing many cases where the existing Solid Tumor guidelines result in very generic NOS histology codes.  For example, lung mass found on imaging with a fine needle aspirate of a lymph node, final diagnosis "positive for malignancy" and comment "consistent with squamous cell carcinoma." See Discussion.

Histology--Urinary: How is histology coded for a diagnosis of bladder carcinoma with a mix of different urothelial carcinoma subtypes? See Discussion.

Solid Tumor Rules (2018)/Histology--Endometrium: Is the histology for a serous carcinoma, high-grade endometrial primary 8441/3 (serous carcinoma) or 8461/3 (high grade serous carcinoma)? See Discussion.

MP/H Rules/Histology: What is the correct histology code for a NUT midline carcinoma?

Solid Tumor Rules (2018)/Histology--Colon: What is the histology for a 2020 pathology report final diagnosis showing invasive adenocarcinoma, poorly differentiated with signet ring cell features and signet-ring cell carcinoma in the synoptic report? See Discussion.