Sir: Nipple inversion is generally a congenital disease, but it sometimes occurs after ductitis or breast operation.1 Anatomically, it is a result of shortened lactiferous ducts, dysplasia of nipple smooth muscles, and insufficient soft tissue. For years, doctors have preferred surgical procedures to narrow the nipple neck or consolidate bulk tissue. However, these procedures may injure the ductal system and affect milk drainage,2 and they sometimes induce scar formation around the areola.3 We have developed a nipple aspirator to correct the deformity in a noninvasive way (national patent no. is 99.228562.3). The aspirator is designed based on negative pressure suction, skin traction, and prolongation. It basically has three parts: a nipple cap, a negative pressure suction apparatus, and a one-way gas valve. All three components are made from poisonous and high-pressure-resistant polyethylene. The cap has an internal ring to hold the projected nipple and avoid suction of the surrounding tissue. The suction apparatus looks like a syringe and acts with the valve to produce and maintain negative pressure. First, the linkage part of the syringe is inserted to push the unidirectional valve open. The nipple is then covered and 3 to 4 ml of air is drawn. Finally, the syringe is taken down to allow the valve to close spontaneously. It should be noted that the instrument should be used under a doctor's supervision. It is suggested that the patient wear the device carefully and gently and adjust wearing time in a stepwise manner. The treatment should last no less than 3 months. About 2000 patients ranging in age from 14 to 36 years old (1936 with bilateral deformity and 64 with unilateral deformity) used the device from March of 1999 to March of 2004. Among these patients, 1960 were single, 40 were married, and five were pregnant. The nipples mostly regain their normal weight within 30 days, but this period was prolonged to more than 3 months in serious cases (n = 5). A 3- to 60-month follow-up revealed no recurrence. The healing rate was 100 percent, and the validity rate was 99 percent (Fig. 1).Fig. 1.: (Above) Pretreatment view. (Center) The patient wearing the nipple aspirator. (Below) Posttreatment view.Some patients experienced blood secretion and mild discomfort in the initial days of use. These complaints disappeared over time. Mucosa formation occurred occasionally after long-time wear. The aspirator can be worn all day to keep the pitted nipple under constant negative pressure; this will help stretch the ducts and lift the nipple. More importantly, supporting tissues will grow around the ducts over time, and finally lead to real projection. Therefore, this device may provide another option for patients with nipple inversion. Hui-Qing Jiang, M.D. Xian Wei, M.D. Si-Ming Yuan, M.D. Li-Ming Tang, M.D. Department of Plastic Surgery Jinling Hospital Nanjing, Jiangsu Province People's Republic of China