'Stranger Things' Sheds Light on a Rare Disorder

The disorder, called cleidocranial dysplasia (CCD), affects only about one in a million people, according to the U.S. National Institutes of Health. Caused by a mutated gene, CCD leads to abnormal bone development -- most apparent in the collarbones and teeth.

from WebMD Health https://ift.tt/39OeRWD