Published Online: Jul 10, 2017
Page range: 169 - 172
Received: Apr 18, 2017
Accepted: May 24, 2017
DOI: https://doi.org/10.1515/jim-2017-0044
Keywords
© 2017 Anca Chiriac et al., published by De Gruyter Open
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Knuckle pads are thickening of the skin over the extensor surface of the proximal interphalangeal joints. Clinical picture, ultrasound imaging, and histopathological examination of the skin biopsy ascertain the diagnosis. In routine practice, two main differential diagnoses are important: knuckle pads vs. pseudo-knuckle pads and idiopathic vs. non-idiopathic forms of knuckle pads.