SEER Inquiry System - View
Source 1: 2007 MP/H Rules
MP/H Rules/Multiple Primaries--Ovary: How many primaries are to be abstracted and which multiple primary rule applies for a patient diagnosed with a carcinosarcoma of the left ovary and a serous carcinoma of the right ovary? See discussion.
The patient underwent a debulking surgery showing a 20.5 cm carcinosarcoma with focal areas of high grade serous carcinoma and extensive high grade stromal sarcoma in the left ovary. The right ovary showed only a high grade serous carcinoma with extensive involvement of the ovarian parenchyma but no sarcomatous elements. While carcinosarcoma is composed of both epithelial and non-epithelial elements, does the presence of a purely epithelial tumor in the contralateral ovary indicate these are separate primaries per rule M8?
Abstract two primaries per rule M8.
Carcinosarcoma (8980) is not an epithelial tumor of the ovary within the range of 8000-8799, so rule M7 does not apply.