MP/H Rules/Multiple primaries/Recurrence -- Lung: How many primaries are accessioned if a diagnosis of squamous cell carcinoma of the lung is followed three years later by a diagnosis of adenocarcinoma of the lung if the pathologist reviews all the slides and states the subsequent diagnosis is a recurrence? See Discussion.
MP/H Rules/Multiple primaries -- Ovary: How many primaries are to be accessioned and what rule applies when a patient has a serous carcinoma of the right ovary treated with neoadjuvant chemotherapy followed by a debulking surgery that revealed a serous tubal intraepithelial carcinoma of the left fallopian tube?
Reportability: Given that per the 2012 SEER Manual and SINQ 20120081 VIN II-III is no longer reportable, does this change exclusively apply to VIN II-III or does it also apply to AIN II-III, VAIN II-III, etc.? See Discussion.
MP/H Rules/Multiple primaries--Breast: How many primaries are accessioned if a patient is diagnosed with inflammatory carcinoma of the left breast, (ductal with apocrine features type on biopsy), and an incidental lobular carcinoma in the right breast? See Discussion.
Reportability--Brain and CNS: Are hemangioma, NOS (9120/0), cavernous hemangioma (9121/0) or venous hemangioma (9122/0) reportable when they arise in the brain or CNS?
Multiple primaries--Heme & Lymphoid Neoplasms: How many primaries are accessioned, and what is the year of diagnosis, when the patient was initially diagnosed with poorly differentiated, diffuse lymphocytic lymphoma, small cleaved cell [9591/3] in 1991, followed by multiple recurrences and transformations? See Discussion.
MP/H Rules/Histology--Colon: What rule applies and how is histology coded if a colon tumor is composed of moderately differentiated adenocarcinoma and neuroendocrine tumor, grade 1 (G1)? See Discussion.
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