SEER Inquiry System - Search

Solid Tumor Rules (2018, 2021/Multiple Primaries/)--Lung: How many primaries should be reported and what M rule applies when a diagnosis of presumed adenocarcinoma in situ (AIS) of the left lung follows a known diagnosis of progressive multifocal malignant adenocarcinoma in the right lung? 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.

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 (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.

Solid Tumor Rules (2018/2021)/Multiple Primaries--Brain and CNS:  How many primaries should be accessioned and what multiple primaries/histology rules apply to a meningioma of the spinal meninges and a meningioma of the cerebral meninges? See Discussion.

Solid Tumor Rules (2018/2021)/Multiple Primaries--Corpus Uteri:  How many primaries should be reported when a hysterectomy identifies primary endometrial carcinosarcoma (8980/3) and the endometrium has a background of endometrioid intraepithelial neoplasia (EIN) (8380/2)? A tumor size is provided for the carcinosarcoma, but not the background EIN.

Solid Tumor Rules (2018/2021)/Multiple Primaries--Skin Cancer:  How many primaries are assigned for sebaceous carcinomas using the Solid Tumor/Multiple Primaries/Histology Rules?  Does this scenario represent eight separate primaries?  See Discussion.

Solid Tumor Rules (2018/2021)/Multiple primaries--Ovary: How many primaries should be reported when patient has right fallopian tube high-grade serous carcinoma and bilateral serous tubal intraepithelial carcinoma (STIC)?  See Discussion.

Solid Tumor Rules (2018/2021)/Multiple primaries--Ovary:  How many primaries should be reported and for which primary site(s) when pathologist identifies bilateral ovarian high-grade serous carcinoma with involvement of the left fallopian tube (also showing serous tubal intraepithelial carcinoma (STIC))?  See Discussion.

Solid Tumor Rules (2018/2021)/Multiple primaries--Prostate: Is basal cell carcinoma with focal squamous differentiation and a small focus of infiltrating prostatic adenocarcinoma one or two primaries and if one, is the histology 8147/3? See Discussion.