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Relationship between sonographic and pathologic findings in epidermal inclusion cysts
1Department of Diagnostic Radiology, College of Medicine, Hanyang University, 17, Haengdang-Dong, Seungdong-Gu, Seoul 133-792, South Korea.
Journal of Clinical Ultrasound : JCU
|October 2, 2001
Summary
Ultrasonography of epidermal inclusion cysts typically shows hypoechoic masses without Doppler signals. Ruptured cysts may appear lobulated with vascularity, mimicking solid masses.
Area of Science:
- Radiology
- Pathology
- Dermatology
Background:
- Epidermal inclusion cysts are common benign skin lesions.
- Accurate sonographic characterization is crucial for diagnosis and management.
Purpose of the Study:
- To evaluate sonographic findings of epidermal inclusion cysts.
- To correlate these findings with histopathologic results.
Main Methods:
- Retrospective review of 24 patients with pathologically confirmed epidermal inclusion cysts.
- Analysis of sonographic features including shape, size, echogenicity, posterior enhancement, and Doppler signals.
- Classification of masses into 5 sonographic types based on echogenicity.
Main Results:
- Most cysts were ovoid/spherical (71%) and hypoechoic with echogenic foci (10 cases).
- Posterior sound enhancement was common (96%).
- Ruptured cysts (4 cases) showed lobulated contours and vascularity on Doppler, mimicking solid masses.
Conclusions:
- Epidermal inclusion cysts typically present as hypoechoic masses with echogenic foci and no Doppler signals.
- Ruptured cysts can exhibit lobulated shapes and vascularity, potentially mimicking malignancy on ultrasound.