Hematemesis is the medical term used to describe vomiting blood. The blood can be bright red, dark red, black, or dark brown, or resemble coffee grounds. It is caused by internal gastrointestinal ...

Fast Five Quiz: The JAK-STAT Pathway and Atopic Dermatitis Do you know the nuances between the JAK-STAT pathway and atopic dermatitis? Check your knowledge with this quick quiz.

Marijuana User With Spontaneous Chest Pain Radiating to His Neck An 18-year-old man presents with sudden-onset chest pain in the midsubsternal region, radiating to the neck. What's the diagnosis?