This is a case of 4-years-old white male who was referred to the dermatology clinic for two localised bald patches on parietal area noted 2 months previously. He was well naurished, well d.eveloped with fairly normal height and weight for his age, but with deafness, mutism, piebaldism, white forlock, paliosis of eye brows and eyelashes and musculoarticular abnormalities all noted from birth and...