Oil Cyst

pink ribbons on pink surface
  • Liquefied fat
  • Can be seen in any part of breast
  • Most common in subareolar region
  • Range from few mm to cm in size
  • Oval to round lucent smooth border lesion
  • Develops rim calcification over time
  • Calcification can be rim, egg-shell or coarse
  • In early stages, same as surrounding fat and difficult to detect
  • Myriad of echogenicity – hyper, iso or hypo
  • Can appear solid when inspissated fat present
  • Sometimes can appear complex with mural nodules, septae
  • Calcified well circumscribed
  • No enhancement
  • T1 hyperintense
  • Faint rim enhancement post Gd