Frontal linear scleroderma (also known as en coup de sabre or morphea en coup de sabre) is a type of linear scleroderma

Linear scleroderma

Linear scleroderma is a type of localized scleroderma which is an auto-immune disorder characterized by a line of thickened skin which can affect the bones and muscles underneath it.-Presentation:...

 characterized by a linear band of atrophy and a furrow in the skin that occurs in the frontal or frontoparietal scalp

Scalp

The scalp is the anatomical area bordered by the face anteriorly and the neck to the sides and posteriorly.-Layers:It is usually described as having five layers, which can conveniently be remembered as a mnemonic:...

. Multiple lesions of en coup de sabre may coexist in a single patient, with one report suggesting that the lesions followed Blaschko's lines

Blaschko's lines

Blaschko's lines, also called the Lines of Blaschko, are skin lines invisible under normal conditions. They become apparent when some diseases of the skin or mucosa manifest themselves according to these patterns...

. It gets its name from the perceived similarity to a sabre

Sabre

The sabre or saber is a kind of backsword that usually has a curved, single-edged blade and a rather large hand guard, covering the knuckles of the hand as well as the thumb and forefinger...

wound.