腋部副乳腺的X线诊断

Mammographic appearance of accessory breast tissue in the axilla

目的 认识腋部副乳腺的X线表现。方法 回顾性复习了 3年来的 75 6 2例女性接受日常乳腺X线检查的内侧斜位照片 ,观察有无副乳腺及其X线表现。诊断依据为 :在腋内有和主乳腺不相连的腺体样结构。结果 75 6 2例中发现腋部副乳腺 16 1例 ,发生率 2 %,平均年龄 39岁。38%发生于两侧 ,42 %发生于右侧 ,2 0 %发生于左侧。最大径线平均为 3 5cm(右 )和 3 3cm(左 )。在形态上 ,斑片状最多 (35 %) ,其余依次为分支状 (2 6 %)、混合状 (2 0 %)及团片状 (19%)。 3例手术病理证实为乳腺组织。结论 腋部副乳腺不少见 ,有一定的X线表现 ,认识它很重要 ,以避免将此种发育异常误认为其他病变。

Objective To observe the mammographic appearance of accessory breast tissue in the axilla. Methods In the past 3 years, 7 562 women were underwent bilateral screen-film mammography. All of the mediolateral oblique(MLO) films were reviewed retrospectively to look for whether there was accessory breast tissue and what the mammographic features were like. Radiographically the accessory tissue resembled the main normal breast glandular tissue but was separated from it. Results Of the 7562 cases, accessory breast tissue in the axilla was detected in 161 cases. The prevalence was 2%. The age ranged from 17 to 70 years (mean, 39 years). 38% of them were found in the bilateral axilla, 42% only in the right, and 20% only in the left. The dimensions on the right ranged from 0.7 to 8.0 cm (mean, 3.5 cm), and that on the left ranged from 1.0 to 7.0 cm (mean, 3.3 cm). There were four types among the accessory breast tissue: patchy type was the most (35%), then the branched type(26%),mixed type(20%), and mass-like type(19%). 3 cases were proved by pathology. Conclusion It is important that the radiologist be familiar with the mammographic appearance of accessory breast tissue in the axilla in order that they could be distinguished from other pathological changes.