This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Musculoskeletal  disorders, Subject name: Pediatrics
En coup de sabre lesion is seen in ? 
Select and explain. 
A. Neonatal lupus, B. Systemic JIA, C. Juvenile Dermatomyosistis, D. Juvenile Scleroderma
D: Juvenile Scleroderma
Answer: D: Juvenile Scleroderma 
Explanation: En coup de Sabre lesion is seen in juvenile localized scleroderma (morphea) It appears as an indented , veical, colorless, line of skin on the forehead. The indentation looks as though the person may have struck (coup) by a sword (sabre) This lesion involves the scalp/or face; lesion can extend into the centra; nervous system, resulting in neurologic sequelae, which are most commonly seizures and headaches. Ref: nelson textbook of pediatrics 21st edition Pgno: 1286