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Pilomatricomas in children: imaging characteristics with pathologic correlation
Hyun Wook Lim1, Soo Ah Im, Gye-Yeon Lim
1Department of Radiology, Kangnam St. Mary's Hospital, The Catholic University of Korea, 505 Banpo-dong, Seocho-gu, Seoul 137-701, South Korea.
Pediatric Radiology
|April 18, 2007
Summary
Pilomatricoma imaging in children is often poorly understood. This study details US, CT, and MR findings, correlating them with pathology to improve diagnosis of this common pediatric skin nodule.
Area of Science:
- Radiology
- Pediatric Imaging
- Dermatopathology
Background:
- Pilomatricoma is a common pediatric skin tumor with poorly defined imaging characteristics.
- Lack of consensus exists regarding imaging findings and histopathologic correlations.
Purpose of the Study:
- To characterize radiologic appearances of pilomatricomas using ultrasound (US), CT, and MRI.
- To correlate imaging findings with histopathologic features.
Main Methods:
- Retrospective analysis of 47 pilomatricoma cases.
- Evaluation of imaging findings on US (n=17), CT (n=31), and MRI (n=5).
- Comparison of imaging data with reviewed histopathologic specimens.
Main Results:
- Lesions appeared as well-circumscribed, subcutaneous nodules attached to skin.
- US showed hyperechoic nodules with shadowing and hypoechoic rim.
- CT revealed enhancing soft-tissue masses with calcifications; MRI showed internal reticulations and patchy areas.
Conclusions:
- Pilomatricoma diagnosis should consider well-defined hyperechoic or calcific subcutaneous nodules on US or CT in children.
- MRI can aid in diagnosis.
- Imaging findings correlate well with histopathologic features.
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