breast, cases Week 424: Case 1 April 26, 2023 pathadmin 1. Presented by Hind Nassar, M.D. and prepared by Aatur Singhi, M.D., Ph.D.81 year old woman with a large breast mass, underwent a mastectomy.Extensive ductal carcinoma in situMetastatic carcinoma to the breastInvasive squamous cell carcinoma with ductal carcinoma in situMalignant skin adnexal tumor involving breast tissue 1. Presented by Hind Nassar, M.D. and prepared by Aatur Singhi, M.D., Ph.D.81 year old woman with a large breast mass, underwent a mastectomy.