What is Zollinger-Ellison syndrome? Zollinger-Ellison syndrome (ZES) is a rare digestive disorder. If you have ZES, you likely have 1 or more tumors in the first part of the small intestine, the ...

Drug reaction with eosinophilia and systemic symptoms (DRESS) syndrome is a rare acute dermatologic emergency. 1 DRESS differs from other adverse drug reactions in its idiosyncratic presentation, time ...

Eosinophilic esophagitis (EoE) occurs when white blood cells called eosinophils build up in the esophagus, the tube that moves food and liquids from the throat to the stomach. This buildup of ...