Radiology Lectures | Radquarters

Ultrasound of Ovarian Dermoid Cyst

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In this radiology lecture, we discuss the ultrasound appearance of ovarian dermoid cyst, including the rarely seen but highly specific “floating sphere” sign!

Key points include

  • AKA mature cystic teratoma.
  • Most common ovarian neoplasm.
  • Benign, mean age 30.
  • 10% bilateral.
  • Mature tissue from ≥2 embryonic germ cell layers: Sebaceous material, hair follicles, skin derivatives, fat, muscle, bone, and other tissues lined by squamous epithelium.
  • Specificity of US diagnosis 94-100%.
  • MRI for changing morphology on f/u and for postmenopausal patients.
  • Ultrasound findings: Floating echogenic spherical structures = “Floating sphere” sign (uncommon but pathognomonic), hyperechoic component with acoustic shadowing (Rokitanksy nodule), hyperechoic lines and dots, fat-fluid levels, diffuse or regional bright echoes.
  • Most common complication: Ovarian torsion.
  • Rare complications: Rupture, infection, malignant transformation, hormone secretion, anti-NMDA receptor encephalitis.

    • To learn more about the Samsung RS85 Prestige ultrasound system, please visit: https://www.bostonimaging.com/rs85-prestige-ultrasound-system-4

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    The post Ultrasound of Ovarian Dermoid Cyst appeared first on Radquarters.

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    Radiology Lectures | RadquartersBy Daniel J. Kowal, MD
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