Allergic reactions are a serious condition many Americans face due to an abnormal immune response in the body that, in some cases, can result in death. An allergic reaction occurs when the immune ...

Some people have an allergic reaction to chemotherapy. Allergic reactions can range from mild skin irritation to life threatening anaphylaxis. To avoid this, your care team will monitor you during and ...

Opioid cross-reactivity is the uncommon occurrence of having an allergic reaction to more than one opioid. Allergies to opioids present a unique challenge in pain management due to the limited ...

Transfusion reactions are medical complications that arise after a blood transfusion. They may occur during the transfusion (known as acute) or weeks after it (delayed). They're further classified ...

“Onion skin,” which doctors call lamellated periosteal reaction, occurs when multiple layers of bone form in a concentric circle around the outer surface of the bone. It can occur with Ewing sarcoma.