Idiopathic Acquired Dacryocystocele Presenting Only with Epiphora: A Very Rare Case Report.

A 42-years-old male presented with left medial canthal swelling, accompanied with only mild epiphora. There was no history of dacryocystitis, mid-facial trauma, surgery, or bloody tears. On examination, there was an immobile, subcutaneous, non-inflammatory mass below the medial canthal tendon. Lacrimal irrigation showed blockade at the nasolacrimal duct. A computerized axial tomography (CAT) scan revealed a non-enhancing, low-density, cystic lesion at the inferomedial margin of the orbit. There were no signs of bony erosion, consistent with idiopathic acquired dacryocystocele. The patient underwent external dacryocystorhinostomy (DCR) with silicone tube intubation. The patient's symptoms of epiphora resolved after surgery. Idiopathic acquired dacryocystocele with only epiphora, although rare, should be considered in differential diagnosis of medial canthal, non-inflammatory swellings. In areas with insufficient endoscopic facilities, external dacryocystorhinostomy gives similar promising results.