SEER Inquiry System - Search

Solid Tumor Rules/Histology--Thyroid: What is the histology code for a diagnosis of poorly differentiated thyroid carcinoma arising in a background of solid papillary thyroid carcinoma? See Discussion.

Solid Tumor Rules/Histology--Thyroid:  What is the correct histology code for a papillary carcinoma, encapsulated with columnar cell features?  See Discussion.

Solid Tumor Rules/Histology--Thyroid:  What is the correct histology code for the following thyroid primary with multiple tumors abstracted as one primary diagnosed prior to 2021?  See Discussion.

Solid Tumor Rules/Histology--Thyroid:  What is the histology code for sclerosing mucoepidermoid carcinoma with eosinophilla in the left thyroid and papillary thyroid carcinoma in the right thyroid?  See Discussion.

Solid Tumor Rules/Histology--Uterine Corpus:  How is histology coded for an epithelioid and myxoid leiomyosarcoma of the myometrium?  See Discussion.

Solid Tumor Rules/Histology/Behavior--Brain and CNS: How are histology and behavior coded when the Integrated Diagnosis is "Meningioma, WHO Grade 2," and the Histological Classification is "Meningioma with elevated mitotic activity, hypercellularity, necrosis, and sheeting architecture?" 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/Multiple Primaries--Bladder: How many primaries and what M Rule applies to a diagnosis of non-invasive urothelial carcinoma of the bladder in 1996, followed by multifocal non-invasive papillary urothelial carcinoma involving bladder, prostatic urethra, and left ureter in 2022? See Discussion.

Solid Tumor Rules/Multiple Primaries--Bladder:  How many primaries and what M Rule applies for a diagnosis of noninvasive micropapillary urothelial carcinoma (8131/2) in 2019, followed by a diagnosis of noninvasive papillary urothelial carcinoma (8130/2) in 2024? 

Solid Tumor Rules/Multiple Primaries--Bladder:  Urinary Sites Solid Tumor Rules (STRs), Rule M6, says to abstract multiple primaries when an invasive tumor occurs more than 60 days after an in situ tumor. Does that 60-day interval apply to the original diagnosis date, or to the latest recurrence? See Discussion.