Short-term follow-up of palpable breast lesions with benign imaging features: evaluation of 375 lesions in 320 women.

摘要

OBJECTIVE: The purpose of this study was to evaluate the feasibility of short-term follow-up of palpable masses that have benign imaging features. MATERIALS AND METHODS: The cases of all women with round, oval, or lobular palpable masses with circumscribed margins and homogeneous ultrasound echotexture for which short-term follow-up was recommended from July 1997 through December 2003 were retrospectively identified. Evaluation was by ultrasound and/or mammography and focused clinical examination. Outcome was assessed with imaging or clinical follow-up lasting at least 12 months. The cancer incidence for palpable lesions was compared with that for nonpalpable lesions recommended for short-term follow-up. RESULTS: In 379 women, 443 palpable masses with benign features for which short-term follow-up was recommended were identified. Outcome data were available on 375 masses in 320 women. Lesions were evaluated with mammography and ultrasound (n = 186) or ultrasound alone (n = 189). Masses were typically identified only with ultrasound (n = 258, 68.8%); were oval (n = 275, 73.3%), of equal density to normal breast tissue on mammograms (n = 95 on 117 mammograms, 81.2%), and hypoechoic (n = 336 in 372 ultrasound examinations, 90.3%); and were prospectively believed to be fibroadenoma (n = 304, 81.1%). Eighty-five lesions (22.7%) were biopsied soon after evaluation, and one 1.5-mm ductal carcinoma in situ was diagnosed. At follow-up (mean, 2.7 years), 26 lesions (6.9%) had grown. Twenty-four of the 26 lesions were biopsied, and no cancer was diagnosed. The overall cancer prevalence was similar for palpable (0.3%) and nonpalpable (1.6%) masses. The cost of short-term follow-up was less than that of biopsy. CONCLUSION: Short-term follow-up is a reasonable alternative to biopsy of palpable breast lesions with benign imaging features, particularly for young women with probable fibroadenoma.