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).
Frontoparietal linear morphea, called en coup de sabre, is characterized by a linear, atrophic depression affecting the frontoparietal aspect of the face and scalp, suggestive of a stroke from a sword, as shown in the image below.