D2I2.
structural

Zenker's diverticulum

A Zenker's diverticulum, also pharyngeal pouch, is a diverticulum of the of the human pharynx, just above the cricopharyngeal muscle. It is a pseudo diverticulum or false diverticulum, also known as a pulsion diverticulum.

Underlined words are explained — tap any of them.

Plain-language summary adapted from Wikipedia. Not medical advice.