<unk>  (also known as "Palmoplantar keratoderma with knuckle pads and leukonychia and deafness") is a cutaneous condition characterized by hyperkeratoses (knuckle pads) over the metacarpophalangeal, proximal and distal interphalangeal joints. It was characterized in 1967. It can be associated with GJB2.
Bart–Pumphrey syndrome
Urban–Rogers–Meyer syndrome
Nance–Horan syndrome
Nicolau–Balus syndrome
McGillivray syndrome
Bart syndrome
Temple–Baraitser syndrome
Say–Meyer syndrome