Clinical Significance of Killian's Dehiscence

Introduction

Killian's dehiscence is an anatomical weak spot in the posterior wall of the pharynx, specifically located between the cricopharyngeal and thyropharyngeal parts of the inferior pharyngeal constrictor muscle.

Histological Structure and Composition

This dehiscence is characterized by the absence of a robust muscular layer, making it susceptible to the formation of pharyngeal diverticula.

Muscular Composition

• The cricopharyngeus acts as a sphincter controlling food passage.
• The thyropharyngeus contributes to the constriction and propulsion of food.

Clinical Significance

The anatomical weakness at Killian's dehiscence can lead to the development of Zenker’s diverticulum, which presents symptoms such as dysphagia, regurgitation, and aspiration.

Diagnosis and Management

Diagnostic techniques include radiographic imaging and endoscopic evaluations. Management strategies range from dietary modifications to surgical interventions such as cricopharyngeal myotomy.