Child had 500 extra teeth extracted and he's going to be fine

In Chennai, India, a 7-year-old boy went to the hospital with a swollen jaw and mouth pain. Turned out he had more than 500 extra teeth. According to Prathiba Ramani, the head of Oral and Maxillofacial Pathology at Saveetha Dental College and Hospital, the teeth were contained in a sac tucked inside his lower jaw. From CNN:

"There were a total of 526 teeth ranging from 0.1 millimeters (.004 inches) to 15 millimeters (0.6 inches). Even the smallest piece had a crown, root and enamel coat indicating it was a tooth," she said.

The boy was released three days after the surgery and is expected to make a full recovery, Ramani said.

Ramani said the boy was suffering from a very rare condition called compound composite odontoma. She said what caused the condition is unclear, but it could be genetic or it could be due to environmental factors like radiation.

"Doctors find 526 teeth in boy's mouth in India" (CNN)