Lacrimal dacryostenosis with severe facial pain misdiagnosed as trigeminal neuralgia.

A 47-year-old woman developed intermittent shooting pain around the right side of the nose and eyes. A neurologist initially diagnosed trigeminal neuralgia, but carbamazepine did not improve the pain. Two months later, she presented with a pus-like eye discharge and was referred to us for further examination. Poor saline irrigation from the lacrimal puncta and computed tomography findings of a swollen lacrimal sac indicated a diagnosis of lacrimal dacryostenosis. At this point, the pain and dizziness as a side effect of carbamazepine had become intolerable. Endoscopic intranasal dacryocystorhinostomy confirmed stenosis of the nasolachrymal duct and a thickened lacrimal sac. The postoperative course was uneventful, and the facial pain disappeared. This experience suggests the importance of recognizing lacrimal dacryostenosis as a differential diagnosis of facial pain around the eyes and nose. We also recommend a review of an original diagnosis of trigeminal neuralgia if carbamazepine fails to relieve facial pain.