Hemorrahagic ovarian cyst

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Hemorrhage into a cystic space in ovarian parenchyma.

Ultrasound Appearance

  • Avascular hypoechoic adnexal "mass" with fine lacy internal pattern
  • May appear as mixed echogenicity mass
  • Clot retraction → rim of fluid within cyst surrounding clot
  • Clot fragmentation → angular margins of clot fragments
  • Majority resorb quickly and leave no sequela on 6 week follow-up scans
  • May rupture