SEER Inquiry System - Search

Solid Tumor Rules (2018)/Multiple primaries--Colon: Is a colorectal anastomotic site recurrence reportable, that is, a second primary, per Rule M7, third bullet, if there is no mention of mucosa but the tumor is seen on colonoscopy? See Discussion.

Solid Tumor Rules (2018)/Multiple Primaries--Breast: The December 2020 revision to 2018 Breast Solid Tumor Rules, Rule M10, using behavior rather than timing to determine the number of primaries, has caused synchronous separate/non-contiguous tumors reported as invasive carcinoma, NST (8500/3) and lobular carcinoma in situ (8520/2) (or vice versa) to be reported as separate primaries per Rule M14. Should an invasive carcinoma NST and a synchronous, separate lobular carcinoma in situ be separate primaries per M14? See Discussion.

Solid Tumor Rules (2018)/Multiple Primaries--Breast: Is a breast resection showing invasive mucinous carcinoma in a single tumor with associated ductal carcinoma in situ and additional findings of a background of lobular carcinoma in situ single or multiple primaries and which M rule applies? See Discussion

Solid Tumor Rules (2018)/Multiple primaries--Breast: How many primary tumors should be abstracted for a 2018 breast excision with a final diagnosis of invasive mucinous adenocarcinoma (0.7 cm) with ductal carcinoma in situ (DCIS) present as discontinuous foci, spanning 12 cm? See Discussion.

Solid Tumor Rules (2018)/Multiple primaries--Breast: How many primaries should be reported for a diagnosis of ductal carcinoma in situ (DCIS) on core biopsy of the right breast in 2016 with all treatment refused, followed by a 2019 large right breast mass ulcerating the skin and clinical diagnosis of invasive breast cancer (patient again refused all treatment)? See Discussion.

Solid Tumor Rules (2018)/Multiple primaries--Breast: How many primaries should be reported for a December 2013 diagnosis of lobular carcinoma in situ (8520/2) in the left breast, treated with a lumpectomy, followed by a July 2018 diagnosis of invasive ductal carcinoma (8500/3) also in the left breast? See Discussion.

Solid Tumor Rules (2018)/Multiple primaries--Breast: How many primaries are there and how is histology coded for a breast primary showing encapsulated papillary carcinoma and Paget disease of the nipple? See Discussion.

Solid Tumor Rules (2018)/Multiple Primaries--Breast: How many primaries are accessioned when there are multiple synchronous/non-contiguous tumors when one tumor is metaplastic carcinoma (with carcinoma No Special Type (NST) or lobular carcinoma) and another tumor is strictly carcinoma, NST? See Discussion.

Solid Tumor Rules (2018)/Multiple Primaries--Brain: How many primaries are there and what M Rule applies when two tumors identified in the brain are pathologically proven to be glioblastoma, IDH-wild type and anaplastic astrocytoma per the pathology report final diagnosis, but the diagnosis comment and tumor board indicates multifocal glioblastoma is favored? See Discussion.

Solid Tumor Rules (2018)/Multiple primaries--Brain and CNS: Rule M6 notes a diagnosis of glioblastoma multiforme is a new primary when it follows a diagnosis of a glial or astrocytic tumor. Does this rule apply if the subsequent diagnosis was just, glioblastoma, NOS or one of the subtypes/variants of glioblastoma multiforme? See Discussion.