Focal scleroderma

Sclerosis (from Greek σκληρός sklērós, "hard") is the stiffening of a tissue or anatomical feature, usually caused by a replacement of the normal organ-specific tissue with connective tissue. The structure may be said to have undergone sclerotic changes or display sclerotic lesions, which refers to the process of sclerosis. [Source: Wikipedia ]

Localized fibrosing scleroderma
Localized scleroderma
OrphaNet reference
Localized scleroderma 
May Cause
Skin aplasia
Skin atrophy
Skin hypoplasia
Soft-tissue calcification