Primetime Live: Medical Mysteries: World's Smallest People/No Fingerprints/Stuttering

A look at primordial dwarfism, a rare disease that retards growth and is a mystery to doctors. Stories of people with DPR, or dermatopathia pigmentosa reticularis, a rare genetic disorder in which people are born without fingerprints. Then, the mystery of stuttering. Finally, another "You Be The Doctor" segment about a woman with a thyroid problem who became disoriented after scuba diving.