Primary immunodeficiency disorders (PIDs) are a heterogeneous group of disorders characterized, as the name suggests, by deficiencies (abnormal, poor or absent function) in the immune system. As ...

Two parallel definitions of the word are used in political discussion. It's a perennial problem that radicals don't define what they're talking about when discussing class, or worse, making sweeping ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. With thousands of exoplanet candidates discovered, astronomers are starting to figure out how to ...

There is no agreement on how to classify, define or diagnose hip-related pain—a common cause of hip and groin pain in young and middle-aged active adults. This complicates the work of clinicians and ...

Neurotrophic keratitis, also known as neurotrophic keratopathy (NK), is a degenerative disease of the cornea caused by damage to the ophthalmic branch of the trigeminal nerve. A healthy cornea and a ...