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  Indian J Med Microbiol
 

Figure 4 Endoscopic view after drilling the spine of sphenoid. The tensor tympani canal (TC) and bony Eustachian tube (BE) can be visualized with 0 degree endoscope.

Figure 4 Endoscopic view after drilling the spine of sphenoid. The tensor tympani canal (TC) and bony Eustachian tube (BE) can be visualized with 0 degree endoscope.