Abstract
The authors report an unusual case of primary frontal sinus cyst. The patient is a 26-year-old man whose chief complaints were a swelling and pain at the left frontal sinus.
At operation, the frontonasal duct was found to be wide open and the main frontal sinus to be intact with normal mucosal lining, but with a cyst at the lateral aspect of the sinus.
The authors speculated the cause of the disease to be that either one of the partitions of the frontal sinus had undergone inflammation with subsequent scar formation isolating a lateral cell or a cell within the depth of the frontal bone had been isolated after inflammatory obstruction of its draining outlet.
