Symptoms and Causes

What Is Zollinger-Ellison Syndrome? Zollinger-Ellison syndrome occurs when tumors called gastrinomas develop in the pancreas or small intestine. These tumors release excessive amounts of gastrin, a…

Overview Thunderclap headaches strike suddenly with intense pain that reaches its peak within 60 seconds, similar to the sudden boom of thunder. These rare headaches can…

Overview Female sexual dysfunction refers to persistent sexual issues that cause distress for a woman or her partner. These problems can affect any part of the…

Overview Cerebral cavernous malformations (CCMs) are abnormal clusters of blood vessels that appear in the brain or spinal cord. These malformations resemble small mulberries and contain…

Overview Patent ductus arteriosus (PDA) is a heart condition where an opening between two main blood vessels from the heart stays open after birth. In a…

Overview Pseudogout is a form of arthritis that causes sudden, painful joint swelling lasting from days to weeks. This condition is formally called calcium pyrophosphate deposition…

Overview Specific phobias involve an overwhelming fear of things or situations that are mostly harmless but trigger severe anxiety. People with these phobias actively avoid what…

Understanding Cervical Insufficiency Cervical insufficiency occurs when the cervix (the lower part of the uterus that connects to the vagina) weakens and opens too early during…

Overview Angiosarcoma is an uncommon cancer that develops in the lining of blood and lymph vessels. When it affects the skin, it typically appears as a…

Overview A patent foramen ovale is a small opening between the upper chambers of the heart that didn’t close after birth as it should have. This…