11508 Background: Tmic is considered a separate pathologic entity with good prognosis, but its clinical significance and management remain controversial. We present our retrospective review of 69 cases of Tmic, among 6,023 BC pts (1%), observed at our institution from 1990 to 2007. Methods: We considered Tmic a single focus of invasive carcinoma ≤ 2 mm or up to 3 foci ≤ 1 mm in greatest dimensions (according to Silver and Tavassoli, Cancer 1998). Descriptive analysis of pts characteristics, treatment and clinical outcome are reported. Results: Among 69 women (mostly asymptomatic, presenting mammographic abnormalities, with median age 52, range 20–78), T≤ 1 mm in 55 pts (80%) and T≤ 2 mm in 14 (20%) were observed. Radical mastectomy was performed in 31 pts (45%) due to extended in situ component or multicentric disease, and breast conserving surgery (BCS) in 38 (55%). All pts but 4, received axillary node dissection (61 pts) or sentinel node biopsy (4 pts), with only 1 N+ pt. The “in situ” component presen...