Solid Tumor Rules (2018)/Multiple primaries--Lung: How are Primary Site and EOD Primary Tumor coded when a patient is diagnosed with four invasive tumors in the right lung that represent three separate primaries, but the not otherwise specified (NOS) tumor and one of the specific subtype/variants are in separate lobes? See Discussion.
Solid Tumor Rules/Multiple primaries--Lung: How many primaries should be accessioned for the following patient scenario?
1) 09/2014 Left upper lobe (LUL), unifocal, localized acinar adenocarcinoma (8550/3) treated with lobectomy.
2) 04/2016 Right lower lobe (RLL), unifocal, localized acinar adenocarcinoma (8550/3) treated with wedge resection.
3) 04/2019 (within 3 years, but masked full date) Left lower lobe (LLL), unifocal, non-small cell carcinoma (8046/3) with brain metastasis. 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.
Multiple primaries--Heme & Lymphoid Neoplasms--Lymphoma: Is a case initially submitted as C772 with histology coded 9591/3 (lymphoma, NOS) with a second case submitted as C162 with histology coded 9699/3 (extranodal marginal zone lymphoma of mucosal-associated lymphoid tissue (MALT lymphoma) a single primary or multiple primaries? See Discussion.
Solid Tumor Rules (2018)/Multiple primaries--Lung: How many primaries are there and what M rules apply for multiple lung histologies in the left lower lobe (LLL) and right upper lobe (RUL) of the lungs? See Discussion.
MP/H Rules/Multiple primaries--Kidney, renal pelvis/Bladder: How many primaries are accessioned if the patient was diagnosed with transitional cell carcinoma in situ of the renal pelvis in October 2006, TCC in situ of the bladder in July 2008 and TCC in situ of the ureter in November 2009?. See Discussion.
Solid Tumor Rules (2018)/Multiple Primaries--Head & Neck: How many primaries are accessioned when a patient is diagnosed with right nasal cavity (C300) invasive nonkeratinizing squamous cell carcinoma (8072/3) in 2015 treated with radiation and excision, followed by a 2019 right nasal cavity (C300) invasive squamous cell carcinoma (NOS, 8070/3)? See Discussion.
Solid Tumor Rules/Multiple Primaries--Rectum/Anal Canal: How many primaries are accessioned and how should histology be coded for a 2021 abdominoperineal resection showing invasive adenocarcinoma of distal rectum and associated Paget disease of the anal mucosa and perianal skin? See Discussion.
Solid Tumor Rules/Multiple Primaries--Pancreas: How many primaries, and what M Rule applies, when a pancreatectomy identified an invasive adenocarcinoma in one pancreatic head tumor, but multiple separate pancreatic neuroendocrine tumors (PanNETs), WHO grade 1, in the pancreatic body? See Discussion.
Solid Tumor Rules/Multiple Primaries--Brain and CNS: How many primaries are accessioned when a 2005 diagnosis of glioblastoma multiforme is followed by a 2024 diagnosis of astrocytoma, IDH-mutant, WHO grade 4? See Discussion.
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