Ovarian teratomas: tumor types and imaging characteristics

Area of Science:

• Radiology
• Gynecologic Oncology
• Medical Imaging

Background:

• Ovarian teratomas are common germ cell tumors with diverse subtypes, including mature cystic teratomas (dermoid cysts), immature teratomas, and monodermal teratomas.
• Accurate differentiation of ovarian teratoma subtypes is crucial for appropriate clinical management and surgical planning.

Purpose of the Study:

• To review and illustrate the characteristic imaging features of various ovarian teratomas using ultrasonography (US), computed tomography (CT), and magnetic resonance (MR) imaging.
• To highlight key imaging findings that aid in distinguishing between different types of ovarian teratomas.

Main Methods:

• Review of imaging findings from ultrasonography (US), computed tomography (CT), and magnetic resonance (MR) imaging in patients with pathologically confirmed ovarian teratomas.
• Correlation of imaging features with histopathological diagnoses.

Main Results:

• Mature cystic teratomas often show echogenic sebaceous material and calcifications on US, fat attenuation on CT, and are identified with fat-saturation on MR imaging.
• Immature teratomas typically present as heterogeneous, partially solid masses with coarse calcifications and fat foci on CT and MR imaging.
• Struma ovarii may appear as heterogeneous, predominantly solid masses with variable signal intensity on MR imaging.

Conclusions:

• Familiarity with the distinct US, CT, and MR imaging characteristics of ovarian teratomas is essential for accurate preoperative diagnosis and differentiation.
• Advanced imaging modalities play a vital role in characterizing ovarian teratomas, guiding treatment decisions, and improving patient outcomes.