MP/H rules/Histology--Lung: How is histology coded for a path diagnosis of "pleomorphic carcinoma with adenocarcinoma, squamous, clear cell and spindle components"? Please see discussion.
MP/H Rules: Regarding rules for Renal Pelvis, ureters, bladder & urethra - Please clarify Rule M8. Rule M8 references Table 1, but table 1 is a table of histologies not primary sites, Rule M8 also seems to contradict Table 2 and Rule M10. Does it matter where the first primary is, ie bladder then urethra or bladder then renal pelvis?
MP/H Rules/Reportability/Diagnostic Confirmation--Colon: Please clarify how to code diagnostic confirmation when there is no mention of a malignant polyp in the pathology report of a familial polyposis case given this statement: "Even if you have only one malignant polyp it is a single primary if there is a diagnosis of FAP. Even if there is no mention of a malignant polyp, if there is a diagnosis of FAP you will use this rule."
MP/H Rules/Recurrence: Is a subsequent diagnosis of an in situ tumor (bladder cancers excluded) a "recurrence" if it follows a prior invasive diagnosis of the original primary cancer made 5 years before?
MP/H Rules/Recurrence--Ovary: How many primaries are accessioned if a patient was diagnosed with ovarian serous carcinoma four years ago and currently has sacral and pelvic masses positive for serous carcinoma on biopsy? Should this be disease progression or a new primary? See Discussion.
MP/H Rules/Recurrence--Breast: If the pathologist and oncologist call a 2007 lobular carcinoma that appears in a skin nodule of a mastectomy scar a recurrence of a patient's 1975 primary breast duct carcinoma, should we abstract this as a new primary? See Discussion.
MP/H Rules/Primary site--Kidney, Renal Pelvis: Should the primary site be changed to C689 [Urinary system, NOS] for a primary renal pelvis tumor after additional tumors are found months later in different urinary sites (e.g., bladder or ureter) and the MP/H Rules indicate these are all the same primary? See Discussion.
MP/H Rules/Multiple primaries: Please clarify how rule M10 for Other Sites was developed and how a "recurrence" of the tumor after one year was determined to be a new primary? See Discussion.