Johnson Blizzard syndrome is a rare disease that is autosomal recessive and can involve several organs in the body. In this disease, the pancreas skull and Ear have abnormal development and mental retardation.hearing impairment and growth disorder are associated with en. Some consider this a form of ectodermal dysplasia.< < > disorders of this disease privately include severe developmental disorder and disorder of the exocrine part of the pancreas so that it is sometimes considered a hereditary pancreatic disease.