A 7-year-old boy complaining of jaw pain was found to have 526 teeth inside his mouth.
He was admitted in July because of swelling and pain near his molars in his lower right jaw.
When doctors scanned and x-rayed his mouth, they found a sac embedded in his lower jaw filled with "abnormal teeth," Dr. Prathiba Ramani, the head of Oral and Maxillofacial Pathology at Saveetha Dental College and Hospital in India said.
After discovering the sac, two surgeons removed it from the boy's mouth.
Then Ramani's team took four to five hours to empty the sac to confirm its contents and discovered the hundreds of teeth.
"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.
The boy actually may have had the extra teeth for some time.
His parents told doctors that they had noticed swelling in his jaw when he was as young as 3, but they couldn't do much about it because he would not stay still or allow doctors to examine him.