Ultrasonographic findings of Pachydermodactyly (PDD): A case report

Pachydermodactyly (PDD) is a rare and benign dermatological disease. Several diagnostic imaging modalities have been used in the evaluation of the disease, for instance, X-ray and magnetic resonance imaging (MRI), while ultrasonography was largely underused. In addition to the dermal thickening recorded in previous literature, we also observed the thickening of the collateral ligament by ultrasound. Based on this finding, some treatments that may damage ligaments, such as intralesional corticosteroids or surgery, should be carefully selected.