[Spontaneous intra-antral rhinolith. A case study]

Rhinoliths of the paranasal sinuses have often been reported and are generally due to trauma and surgery of these cavities and to retained foreign bodies. In the present case, an unilateral chronic rhinosinusitis had been treated by antiinflammatory agents only, but never underwent surgery or trauma. Tomography revealed a high density concretion. A solid rhinolith was removed by a Caldwell-Luc procedure and was then submitted to spectrographic and electron microscopic investigations.