<prompt> Killians dehisence is seen in:OropharynxNasophrynxCricopharynxVocal cords  <response>: Ans. C Cricopharynx Ref. Scott Browns lthed Vol 2 Chapter 155 p 2045; Dhingra 5thed p 253, 6thed p 238 Killians Dehiscence Fig. 8.6 it is an area of weakness between the two pas of inferior constrictor muscle-sub thyropharyngeus and cricopha-ryngeus A pulsion diveiculum of pharyngeal mucosa can emerge posteriorly through the Killians dehiscence called as Zenkers diveiculum or pharyngeal pouch. Since it is an area of weakness it is one of the sites of esophageal perforation during instrumentation and scopy-hence also called Gateway of Tears 