Lobular carcinoma in situ of the breast: results of a radiosurgical conservative treatment.

Abstract

From 1980 to 1992, 17 women underwent lumpectomy (13) or quadrantectomy (4) and whole breast irradiation (median dose: 52 Gy) for pure lobular carcinoma in situ (LCIS). Three cases correspond to palpable lesions and 14 were discovered only by mammography. Twelve women also received tamoxifen at 20 mg/day for two years. With a median follow-up of 88 months, no local or regional recurrences have been recorded. The global rate of bilateral carcinoma was 17.6% (2 synchronous and one metachronous). In the literature, only eight other cases of LCIS were treated by lumpectomy and radiation therapy, but without details and data on long-term results. After biopsy alone for LCIS subsequent infiltrating carcinoma occurred in about 15% of the cases. Thus, the classical radiosurgical association should represent an interesting alternative both for biopsy alone and radical surgery until now only proposed to treat LCIS.