[Simultaneous bilateral breast carcinoma--case study and review of primitive bilateral breast cancer].

Bilateral breast cancer is uncommon and difficult to define because it may manifest as simultaneous, synchronous or metachronous tumours. The true clonal origin and biologic behaviour are still controversial. Following a right breast contusion, bilateral breast tumours were diagnosed in a 74 old female patient; the left one, neglected for 3 years, typically scirrous; the right one with cystic, pseudo-inflammatory appearance.