Invasive lobular carcinoma with extracellular mucin (ILCEM): clinicopathologic and molecular characterization of a rare entity

T. Rinda Soong, Deborah Dillon, Travis Rice‐Stitt, Tad J. Wieczorek, Gabrielle M. Baker, Farbod Darvishian, Laura C. Collins, Susan C. Lester, Stuart J. Schnitt, Beth Harrison