Breast schwannoma: A case report and brief review of literature

Introduction: Schwannoma is a type of tumor deriving from Schwann cells of the peripheral nerves. Schwannomas have the potential to develop anywhere in the body where peripheral nerves exist; breast schwannomas are particularly rare. Case Report: This case reports an occurrence of breast schwannoma observed over a five-year period in Washington. Initial identification of the mass presented with low-level internal echoes, moderate peripheral vascularity, and questionable internal vascularity. Five-year follow-up demonstrated mild increase in size and development from an initially well circumscribed hypoechoic lesion to growing not-well circumscribed margins. Core biopsy and pathology showed evidence of palisading and diffusely positive S100, confirming diagnosis of schwannoma. The patient underwent surgical excision. Conclusion: This case opens discussion for the potential of long-term follow-up for benign masses as alternatives to immediate surgical excision.