This is a very common condition amongst Anglo-Saxon people. Although there are various risk factors, being male, less than 50 years of age and having a family history of the disease tends to put you at higher risk. Rates of recurrence of the disease are higher, the longer you live.
The skin of the palm and underlying tissue thickens, so pulling down the finger. The tendon is not affected, although the rope like cord can feel similar to a tendon.
There are many treatment options, from no treatment, radiotherapy, minimally invasive release of the cord, chemical release of the cord and surgery. Your surgeon will guide you through the possible treatment options (see teaching section) and also useful information can be found on www.dupuytren-online.info