BACKGROUND

Ectopic breast tissue is a rare condition in the Caucasian population. The most frequent form is polythelia (supernumerary nipples), whereas polymastia (complete supernumerary breasts) is more uncommon. They are usually benign asymptomatic lesions that go undetected until pregnancy or lactation. However, they are under the same hormonal influence as normal breast tissue and therefore are susceptible to malignant changes.

CASE

a 12-year-old girl presented bilateral axillary polymastia and polythelia, detected with puberal changes. Surgical removal was postponed until the end of puberal development.

SUMMARY AND CONCLUSIONS

Polymastia is a rare condition that can have psychological consequences, especially in adolescents. It has been associated with other malformations and malignant tumours, so surgical removal is usually recommended.

中文翻译：

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12岁女孩双侧腋窝肿瘤一例报告

 背景

异位乳腺组织在白种人中是一种罕见的疾病。最常见的形式是多乳症（多乳头），而多乳症（完全多乳）则更为罕见。它们通常是良性无症状病变，直到怀孕或哺乳期才被发现。然而，它们与正常乳腺组织受到相同的激素影响，因此容易发生恶性变化。

 案件

一名 12 岁女孩出现双侧腋窝多乳症和多乳症，并伴有青春期变化。手术切除被推迟到青春期发育结束。

 总结和结论

多乳症是一种罕见的疾病，可能会产生心理后果，尤其是在青少年中。它与其他畸形和恶性肿瘤有关，因此通常建议手术切除。