A dacryocystorhinostomy may fail due to a problem along the canaliculu
s, at the ostomy site of nasolacrimal sac to nose, due to an intranasa
l problem or related to the stent. The ''sump syndrome'' occurs when a
residual nasolacrimal sac forms, collects fluids, and leads to tearin
g. This entity, although uncommon, has a characteristic clinical histo
ry and radiologic appearance.