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?
MP/H Rules/Histology--Colon: If a tubulovillous (TV) adenoma is in situ and other polyp(s) have an invasive component, does the in situ TV adenoma still have priority and should rule H18 be applied?
MP/H Rules/Multiple primaries--Ovary: How many primaries are to be abstracted when a patient is diagnosed with serous cystadenocarcinoma [8441] of the right ovary and clear cell adenocarcinoma [8310] of the left ovary? See Discussion.
MP/H Rules/Recurrence--Breast: Do we use a pathologists comment of "recurrent ductal carcinoma" found in the pathology report for a new specimen to determine whether the new specimen actually represents a new primary or recurrent disease? See Discussion.
MP/H Rules/Histology--Thyroid: How is histology coded for a thyroid tumor described as "predominantly papillary carcinoma, tall cell variant, follicular type"?
MP/H Rules/Histology--Peritoneal primary: Can the cell types from the primary site and a metastatic site be combined to code histology? See Discussion.
MP/H Rules/Histology--Breast: What histology is coded for a tumor diagnosed as "intraductal papillary carcinoma (neuroendocrine differentiation)"? See Discussion.
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