Tonsillolith.

A chance finding of the tonsillolith in the peritonsillar abscess of a 10-year-old girl is reported. The 26 X 4 mm calculus weighing 0.84 grams was analyzed by means of infrared spectroscopy and X-ray difraction, and identified as a dahllite. The concretion surface was documented by a scan. A literary survey of 29 reports of tonsilloliths is presented and their causes in the palatine tonsil are discussed.