MP/H Rules/Multiple primaries--Colon: How many primaries are accessioned for a patient with two colon carcinomas in different segments of colon when there is no documentation that either tumor arose in a polyp, there is no statement indicating the presence of adenomatous polyposis coli and the resected pathology specimen indicates the presence of over 200 polyps? See Discussion.
MP/H Rules/Multiple primaries--Breast: Would a left chest wall mass excision stated to be ductal carcinoma consistent with a breast primary and, "compatible with either local recurrence or potentially a metastasis" be a new primary per the MP/H rules? See Discussion.
MP/H Rules/Multiple primaries--Breast: Is the diagnosis of Paget disease two years after a diagnosis of infiltrating duct carcinoma of the same breast a new primary? See discussion.
MP/H Rules/Multiple primaries--Breast: How many primaries should be reported when an in situ diagnosis is followed by an invasive diagnosis in the same breast 1.5 years later? See Discussion.
MP/H Rules/Multiple primaries--Breast: How many primaries are to be reported if different recurrence scores are found on the Oncotype Dx studies performed for multiple tumors in the same breast if the clinician states the patient has two primaries but the pathologist does not address the issue? See Discussion.
MP/H Rules/Multiple primaries--Breast: How many primaries are reported and what is the histology for each in a case of infiltrating duct and lobular carcinoma of the breast (8522) with Paget disease of the same breast?
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.
MP/H Rules/Multiple primaries--Breast: How many primaries are accessioned if a pathology specimen reveals an infiltrating mammary carcinoma with mixed tubular and lobular features, 2.3 cm, low grade cribriform in situ ductal carcinoma, and Paget disease of the overlying skin with ulceration? See Discussion.
MP/H Rules/Multiple primaries--Brain: Does a patient diagnosed with anaplastic astrocytoma of the left temporal lobe in 2000 followed by a diagnosis of oligoastrocytoma of the right frontal lobe in 2007 have a single primary per rule M7 or multiple primaries per rule M8? See Discussion.
MP/H Rules/Multiple primaries--Brain and CNS: How many primaries are accessioned for a diagnosis of cerebral cavernous malformation disorder (CCM1) and MRI evidence of dozens of cavernous angiomas/malformations throughout the supra and infratentorium? See Discussion.
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