I have been struggling with this for 30 years. 3 operations and another one coming soon.
Dupuytren's contracture usually begins as a thickening of the skin on the palm of your hand. As Dupuytren's contracture progresses, the skin on the palm of your hand may appear puckered or dimpled. A firm lump of tissue may form on your palm. This lump may be sensitive to the touch but usually isn't painful.
In later stages of Dupuytren's contracture, cords of tissue form under the skin on your palm and may extend up to your fingers. As these cords tighten, your fingers may be pulled toward your palm, sometimes severely.
They don't know the actual cause, most common in older men of northern European decent. But they do know it happens because an overactive immune system is attacking the body...sound familiar? So, maybe the Sarc has been with me most of my life.