Pachydermodactyly in an 11-Year-Old Female: A Multimodal Ultrasonography Perspective.
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BACKGROUND: Pachydermodactyly (PDD) is a rare benign fibromatosis that mimics inflammatory arthritis, posing diagnostic challenges in pediatric populations. CASE PRESENTATION: We report an 11-year-old female with unilateral proximal interphalangeal (PIP) joint swelling. IMAGING FINDINGS: Gray-scale ultrasound revealed symmetric dermal thickening (2.02 mm) with hypoechoic texture, while Doppler confirmed absent vascularity. Shear wave elastography demonstrated elevated tissue stiffness (shear wave velocity: 4.8 m/s). CONCLUSION: This case underscores the utility of non-invasive multimodal ultrasonography in differentiating PDD from inflammatory arthropathies, avoiding unnecessary biopsies and therapies.