Teaching Case 25

46 y/o F with presents with a palpable area of concern in the right axilla. What is the most likely diagnosis?


  • Slow-growing, painless, benign nerve-sheath tumor
  • Can be painful during biopsy because of increased innervation
  • US: Anechoic to very hypoechic axillary lesions – check Doppler for flow
  • Remember cysts are uncommon in axilla unless present in accessory breast tissue

Related Radiology Article: Yin C, Porembka JH, Hwang H, Hayes JC. Neurofibroma in the Breast: Diagnosis and Management Considerations. Journal of Breast Imaging. 2021 May;3(3):363-8.