Dupuytren's Contracture (also called Dupuytren's Syndrome) is a disease that causes knots to form, usually in the palms of the hands, and can cause eventual tightening of cords, restricting the movements of certain fingers--particularly the ring finger and the pinky. Dupuytren's can be associated with conditions that cause contractures in other areas of the body. If the contracture occurs in the feet, it is called Ledderhosen.
Soles of the feet (Ledderhose disease)
Knuckle pads (Garrod knuckle pads)
More information (links):
http://www.webmd.com/arthritis/understanding-dupuytrens-contracture#1
http://www.mayoclinic.org/diseases-conditions/dupuytrens-contracture/basics/definition/con-20024378
