“…Its incidence is 1-2.8 per 10,000 live births [1,4,]. Exact etiology of ACC is not known, but is considered to be multifactorial and is affected by various factors like genetics, intra-uterine trauma, infection, decreased blood supply to skin and teratogens (carbimazole, methimazole, valproic acid, non-steroidal anti-inflammatory drugs) [1,2,5,6]. ACC can occur anywhere on the body but most commonly seen on the scalp [1,5,7].…”