Patient presented for US which revealed a mass in the left b…

Patient presented for US which revealed a mass in the left breast UIQ and a mass in the LOQ of right breast. Biopsy showed Ductal carcinoma in the left breast and ductal carcinoma in situ in the right breast. How many primaries do you have and what is the M rule? (There will be two answers)

ER Physician stated the patient has bilateral breast cancer….

ER Physician stated the patient has bilateral breast cancer. After obtaining outside facility (OSF) pathology report it was revealed patient had ductal carcinoma of the left breast and metastatic ductal carcinoma in the right breast from left primary. How many primary(s) to I have and what is my M Rule? (there will be 2 answers)