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. 2009 Nov 2;3:587–591. doi: 10.2147/opth.s7706

Figure 1.

Figure 1

Computed tomography of the coronal view demonstrating the blockage of the ostiomeatal complex. A medial mass lesion at the lacrimal sac is noted. A bony osteium in the lacrimal bone is apparent from the first initial external dacryocystorhinostomy providing patency into the nasolacrimal duct.