[Spindle cell carcinoma of the breast with neuroendocrine differentiation. A rare entity simulating a benign tumor].
We report a case of spindle cell carcinoma of the breast with neuroendocrine and mucinous differentiation. Histological diagnosis can be difficult as macroscopic appearance and low grade cytologic features suggest a benign tumor. Differential diagnosis with a fusiform benign tumor of myoepithelial origin should be discussed. Immunohistochemistry is essential to confirm the diagnosis.
Lefort
E
E
Service d'Anatomie et Cytologie Pathologiques, Hôpital Beaujon, Clichy.
Groussard
O
O
Bouquet de la Jolinière
J
J
Degott
C
C
Zafrani
B
B
D000368:Aged; D001943:Breast Neoplasms / Q000473:pathology*; D018278:Carcinoma, Neuroendocrine / Q000473:pathology*; D002454:Cell Differentiation / Q000502:physiology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007150:Immunohistochemistry