Idiopathic acquired dacryocystocele treated with endonasal endoscopic dacryocystorhinostomy.

A 64-year-old woman presented with a medial canthal mass in her left eye, which was accompanied only by mild epiphora. There was no history of dacryocystitis, bloody tears, midfacial trauma or surgery. Physical examination showed a non-inflammatory, subcutaneous, immobile mass below the level of the medial canthal tendon. Lacrimal irrigation demonstrated blockage at the nasolacrimal duct. A CT revealed a non-enhancing, low density, cystic lesion in the inferomedial aspect of the left orbit without bony erosion, which was compatible with an idiopathic acquired dacryocystocele. The patient underwent endonasal endoscopic dacryocystorhinostomy (DCR) and silicone intubation. Epiphora resolved immediately after surgery. Two years after surgery, the patient has had no recurrence of either the epiphora or the orbital. Idiopathic acquired dacryocystocele associated only with epiphora without accompanying dacryocystitis although rare should be considered in the differential diagnosis of acquired non-inflammatory medial canthal masses. Endonasal endoscopic DCR represents a safe and effective treatment.