To evaluate the role of performing ultrasound (US)-guided vacuum-assisted breast biopsies for the treatment (mammotome excision) of gynecomastia.

Between November 2005 and December 2006, nine male patients underwent US-guided mammotome excision for eleven cases of true gynecomastia. The patient ages ranged from 14 to 55 years (mean age, 32.3 years). US-guided mammotome excision was performed with an 11-gauge needle in seven cases and an 8-gauge needle in four cases. After the procedure, the cigarette method using gauze packing was performed. The number of samples, procedure time and presence of complications were evaluated. Scheduled follow-up physical and US examinations were performed after three and six months.

For 11 cases of US-guided mammotome excision of gynecomastia, the number of samples ranged from 12-126 (mean, 66) and the procedure time ranged from 10-42 minutes (mean time, 25.1 minutes). Clinical significant complications did not occur immediately after the procedure and complications were not seen after a follow-up examination in any of the cases. At the 3- and 6-month follow up examinations, all of the patients showed a normal male physical appearance on a physical examination and there was no evidence of hypoechoic glandular tissues as seen on ultrasonograms.

US-guided mammotome excision is effective for the treatment of small, glandular true gynecomastia and is suggested as a new modality to replace the need for surgery or liposuction.