Anatomic Pathology Abstracts, 3/18
March 2018—Magee equation 3 for predicting response to chemotherapy in some breast tumors: Magee equations were derived as an inexpensive, rapid alternative to the Oncotype DX commercial assay. Magee equation 3 uses immunohistochemical and FISH data for estrogen receptor (ER), progesterone receptor (PR), HER2, and Ki-67 for its calculation: 24.30812+ERIHC×(–.02177)+PRIHC×(−0.02884)+(0 for HER2 negative, 1.46495 for equivocal, 12.75525 for HER2 positive)+Ki-67×0.18649.