Superficial angiomyxoma of the breast in a 25-year-old woman without carney’s complex: case report and literature review

Abstract

Background: Superficial angiomyxoma (SAM) is a rare, benign tumor characterized by scattered stellate or spindle cells and thin-walled blood vessels embedded in abundant myxoid stroma. It was first reported as a cutaneous myxoma associated with Carney complex in 1985, and lesions are commonly located in the eyelids, external ear canal, and nipples and often appear in multiples. In cases with no evidence of Carney complex, the incidence of breast SAM is extremely rare. Case presentation: We reported a case of a 25-year-old Chinese woman presented with a left breast lump in the subareolar region for three years and gradually increased in size. No evidence of Carney complex was noted. Breast ultrasonography (US) and magnetic resonance imaging (MRI) were undertaken with US BI-RADS 4A and MR BI-RADS 4, respectively. The patient denied biopsy and underwent a lumpectomy and was diagnosed with SAM. There was no tumor recurrence after 18 months of follow-up. Conclusion: This case report suggests that the preoperative US and MRI characteristics of breast SAM are specific and in accordance well with the histological appearances. Recognition of these imaging features may be helpful for the diagnosis of SAM. And complete excision and long-time regular follow-up after surgery are recommended.