incumbent. adj. 1. (often: postpositive and foll by on or upon and an infinitive) morally binding or necessary; obligatory: it is incumbent on me to attend.
Morphea, also known as localized scleroderma, is a condition which causes hardening and discoloration of the skin. It is thought to be isolated to the skin without internal organ involvement as seen in systemic sclerosis (commonly known as scleroderma).
morphea - localized scleroderma. dermatosclerosis, scleroderma - an autoimmune disease that affects the blood vessels and connective tissue; fibrous connective tissue is deposited in the skin.