DOI: 10.36347/sjmcr.2016.v04i10.022

Pages: 775-776

Extraskeletal Ewing's Sarcoma/Primitive Neuroectodermal Tumor (EWS/PNET) presenting as a breast mass is uncommon. EWS/PNET of the breast may impose a diagnostic challenge, mammography and ultrasonography features are nonspecific. The histopathological pattern is variable depending on the degree of neuroectodermal differentiation. Immuno-phenotyping is necessary and genetic study is the only confirmatory tool. We report a case of a 29 year old lady who developed a painless breast swelling during pregnancy and diagnosed to have ewing's sarcoma of the breast.