Left, A band of linear scleroderma extends from the proximal thigh to below the medial aspect of the knee into the leg. The depression just above the knee is caused by atrophied tissues. The lesion is hypopigmented. Linear scleroderma may involve subcutaneous tissues and muscle and can result in considerable deformity. It is not usually associated with systemic disease. Right, The posterior aspect of the right thigh and leg is involved from the buttock to the ankle. Both hypopigmentation and hyperpigmentation are present. Atrophied tissues in the calf region are secondary to muscle involvement.