Cancer Dictionary

HER2/neu is a gene that produces HER2 proteins, often associated with aggressive types of cancer, notably breast cancer. An overexpression of this gene can lead to rapid cell growth and division, contributing to tumor development. HER2-positive cancers are typically more advanced at diagnosis and require specific treatment approaches.

Hematocrit refers to a blood test that determines the proportion of red blood cells in your blood. It is often used to diagnose conditions such as anemia, dehydration, or diseases affecting red blood cell production. A higher or lower than normal hematocrit level may indicate medical conditions that need further evaluation.

Hemoglobin is a protein found in red blood cells responsible for carrying oxygen from the lungs to the body's tissues and returning carbon dioxide back to the lungs. It gives the blood its red color and helps maintain the body's overall health and vitality.

Hodgkin lymphoma, also known as Hodgkin's disease, is a type of blood cancer that originates in the lymphatic system, which is part of the body's immune system. This condition is characterized by the abnormal growth of cells in the lymph nodes, often causing swelling and potentially spreading to other body parts. Typical symptoms include painless swollen lymph nodes, fatigue, and unexplained weight loss.

Hypercalcemia is a medical condition characterized by an abnormally high level of calcium in the blood. It can be caused by several factors such as hyperparathyroidism, certain types of cancer, or excessive intake of vitamin D. Symptoms may include frequent urination, fatigue, nausea, or bone pain. If left untreated, it can lead to serious complications, including kidney stones and cognitive issues.