Ultrasonographic findings of Pachydermodactyly (PDD): A case report

Pachydermodactyly (PDD) is a rare and benign dermatological dis-ease. Several diagnostic imaging modalities have been used in the eval-uation of the disease, for instance, X-ray and magnetic resonance imag-ing (MRI), while ultrasonography was largely underused. In addition to the dermal thickening recorded in previous literature, we also ob-served 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.