Zenker's diverticulum is a pouch at the back of the throat at a weak spot where the throat and esophagus join. These diverticula are uncommon and tend to occur in elderly people.

Zika is a virus passed on through the bite of a mosquito. It may also be spread through sexual contact and blood transfusions.

Zika virus, often called Zika, most often is spread through the bite of an infected mosquito. In rare cases, it also may be spread by an infected man to his sexual partners. Zika is rarely deadly and people with the disease often don't ...

Zollinger-Ellison syndrome (ZES) is a rare digestive disorder. If you have ZES, you likely have one or more tumors in the first part of the small intestine, the pancreas, or both. These tumors release the hormone gastrin. This causes the...