title: Primary signet ring cell carcinoma of the breast.
abstract: Light microscopic (LM), histochemical, and electron microscopic (EM) investigations of a case of signet ring cell carcinoma (SRC) of the breast indicate that SRC is a variant of mucin-producing carcinoma and that in this particular case, it is of ductal origin.
mesh_terms: D002288:Adenocarcinoma, Mucinous / Q000473:pathology* / Q000648:ultrastructure; D001943:Breast Neoplasms / Q000473:pathology* / Q000648:ultrastructure; D002285:Carcinoma, Intraductal, Noninfiltrating / Q000473:pathology / Q000648:ultrastructure; D005260:Female; D006801:Humans; D008854:Microscopy, Electron; D008875:Middle Aged