Dermoid cyst ultrasound

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [2]Associate Editor(s)-in-Chief: Soujanya Thummathati, MBBS [3]

Overview

Ultrasound may be helpful in the diagnosis of ovarian dermoid cyst. Findings on pelvic ultrasound suggestive of ovarian dermoid include unilocular, cystic adnexal mass with mural components, diffusely or partially echogenic mass with posterior sound attenuation (from the sebaceous material and hair within the cyst cavity), an echogenic interface at the edge of mass that obscures deep structures, mural hyperechoic dermoid plug, presence of fluid-fluid levels, and multiple thin, echogenic bands caused by hair in the cyst cavity (the dot-dash pattern).^[1]^[2]

Ultrasound

Ultrasound may be helpful in the diagnosis of ovarian dermoid cyst.
Findings on pelvic ultrasound suggestive of ovarian dermoid include:^[1]^[2]
- Unilocular, cystic adnexal mass with mural components
- Diffusely or partially echogenic mass with posterior sound attenuation from the sebaceous material and hair within the cyst cavity
  - An echogenic interface at the edge of mass that obscures deep structures (the tip of the iceberg sign)
- Mural hyperechoic dermoid plug (rokitansky nodule)
- Echogenic, shadowing calcific or dental (tooth) components
- Presence of fluid-fluid levels
- Multiple thin, echogenic bands caused by hair in the cyst cavity (the dot-dash pattern)

Doppler Ultrasound

Doppler ultrasound may be helpful in the exclusion of other vascular ovarian masses.
The findings on doppler ultrasound may include:^[1]
- No internal vascularity
  - Internal vascularity needs further workup to exclude a malignant lesion.

Gallery

The ultrasound of the submental area showing a sizeable infrasonic formation with distinct boundaries.^[3]
The ultrasound of the submental area showing a sizeable infrasonic formation with distinct boundaries.^[3]
Tansabdominal USG: Uterus long axis - normal uterus, left adnexal ovarian dermoid cystic lesion noted.^[4]
Ovarian dermoid left adnexa^[4]
Ovarian dermoid right adnexa^[4]