Two rare cases of spontaneously discharged sialoliths are reported.
Case 1: A 72-year-old man was referred to our clinic for painless swelling in the right submandibular region. Radiographic examination revealed an opaque mass in the right Wharton's duct. Although we recommended surgical treatment, he refused. Twenty months later, he came for re-examination bringing with him a sialolith. The sialolith had been spontaneously discharged from the right side of the oral floor. The size of the stone was 30×20×15mm. The form was egg-shaped, the surface was rough, and the color was yellowish white.
Case 2: The patient was a 54-year-old woman complaining of swelling in the right submandibular region. Radiographic examination revealed a sialolith in the right Wharton's duct. The sialolith had been spontaneously discharged from the right side of the oral floor 2 weeks after her first visit. The size of the stone was 15×9×6mm. The form was eggshaped, the surface was rough, and the color was yellowish white.
The sialolith was examined with a scanning electron microscope equipped with an electron probe X-ray microanalyzer. The cut surface of the stone consisted of concentric layers sorrounding a single central core. Calcium, phosphorus, and sulphur were detected as the main components of the sialolith.
