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Fig. 3C. —58-year-old woman with left epiphora. Dynamic MR dacryocystogram (at 40 sec after injection). Obstruction point (large curved arrow) is in lower nasolacrimal duct above valve of Hasner. Pressure injection does not overcome obstructed point, and injected fluid is spilling from conjunctival sac on affected side (straight arrow). On right side, note normal lacrimal drainage (small curved arrows).