Bart–Pumphrey syndrome (also known as "Palmoplantar keratoderma with knuckle pads and leukonychia and deafness") is a cutaneous condition characterized by hyperkeratoses (knuckle pads) over the metacarpophalangeal and proximal and distal interphalangeal joints.
^Richard G, Brown N, Ishida-Yamamoto A, Krol A (November 2004). "Expanding the phenotypic spectrum of Cx26 disorders: Bart-Pumphrey syndrome is caused by a novel missense mutation in GJB2". J. Invest. Dermatol.123 (5): 856–63. doi:10.1111/j.0022-202X.2004.23470.x. PMID15482471.