• Wenyi Chen, Huan Zhang, Jiayan Huang, Yixuan Li, Zhang Zhang, and Yulan Peng.
• Department of Ultrasound.
• Medicine (Baltimore). 2019 Apr 1; 98 (15): e15142e15142.

RationaleTraumatic neuroma is a reparative proliferative response of the nerve after trauma or surgery, which rarely occurs in the breast. However, it must be distinguished from tumor recurrence.Patient ConcernsA 78-year-old woman underwent left-sided modified radical mastectomy for invasive carcinoma, 7 years before this case. Two painless nodules near the mastectomy scar were discovered in regular follow-up physical examination. A 62-year-old woman had received right-sided modified radical mastectomy for intraductal carcinoma, 4 years before this case. An asymptomatic nodule near the mastectomy scar was detected during follow-up ultrasound (US) examination.DiagnosisThe lesions in both patients were diagnosed as traumatic neuroma.InterventionsThe first patient underwent excisional biopsy. The second patient underwent US guided core-needle aspiration, followed by conservative therapy.OutcomesNeither patient complained of any discomfort, nor both exhibited normal physical and US findings during follow-up examinations.LessonsNewly discovered nodules with the benign imaging features near the mastectomy site of a patient, especially with the tail sign, traumatic neuromas should be taken into consideration. Routine US examination is important for follow-up of breast cancer patients who have undergone mastectomy.

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