Subungual keratoacanthoma: ultrasound and magnetic resonance imaging findings.
case_report · Level V
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Abstract
Subungual keratoacanthoma is a rare, squamoproliferative neoplasm arising at the nail bed. It may cause erosion of the underlying bone. We report a case of subungual keratoacanthoma of the right thumb in a 63-year-old man. Radiographs showed cortical erosion of the distal phalanx of the right thumb. Ultrasonography showed a mixed echoic tumor. On magnetic resonance imaging (MRI), the tumor showed intermediate signal intensity on T1-weighted images and mixed intermediate and high signal intensity on T2-weighted images with peripheral thin rim enhancement.
Medical subject headings
- Keratoacanthoma
- Magnetic Resonance Imaging
- Nail Diseases
- Thumb