The swelling was widespread but the breast was not tender.In both cases, a sonogram revealed a huge, well-defined tumor embedded in the lateral portion of the right breast.

• 目前对于青少年为何会发生巨大乳房纤维腺瘤的原因还不是很清楚，一般认为是部分乳房组织对于体内少量女性荷尔蒙过于敏感所致。