Features of recurrence of triple-negative (TN), non-metastatic breast cancer (NMBC) patients: A single institution study.

180 Background: The TN BC is the most agressive subtype. Previous studies suggested that DFS of women with TN-BC is shorter than any other subtype and they demonstrated racial differences. The behaviour of these tumours are characterised by poor prognosis affecting mostly African American young obese women. Our goal is to determine the incidence of TN in non metastatic (NM) BC, the recurrence rate (RR), the patterns of recurrence by anatomic region and the DFS. Methods: We reviewed the medical records of patients with BC diagnosed between Jan/2000 to Dec/2005 at Almenara Hospital in Lima, Peru. There were a total of 1042 patients with BC; of them 215 were identified as TN NM BC according to IHC ER, PR, and Her2/neu negatives. We collected the clinical data including age, menopausal status, staging, hormone receptor status as well as Her2/neu status. The data were analized by statistic software SPSS v. 17.0. Results: The incidence of TN NM BC were 20.6% (215); of them 18.6% (40) patients had recurrences. The median age of recurrence were 52.5 years (31-93); the median DFS were 27 months, with a median follow-up of 64 months. According to inicial staging the recurrences were 7.5% (3); 32.5% (13); and 60% (24) respectively for patients with stages I, II and III. Almost one third (35%) of patients with recurrences were lymphatic node negative at diagnosis after mastectomy. The most frequent involved organs were visceral (lung=12, liver=3) 37.5% (15); bone 25% (10); skin 20% (8); CNS 12.5% (5) and contralateral breast 5% (2). There were four nuliparus women two of them had skin recurrence and the others two had bone metastasis. Conclusions: TN NM BC constitutes 20.6% of all BC in our institution; the majority of relapses were stage III (60%). The median DFS for recurrence were 27 months and the most frequent sites involved were visceral (37%) and bone (25%). 12.5% of recurrences were to CNS and one third of the patients were lymph node negatives. This is to our knowledge the first study of patterns of recurrence in TN nonmetastatic BC in a Latino population. The incidence of TN-BC which is close to African-American population (25%).