Cancer-Related Dictionary

"HER2 positive" refers to a type of breast cancer that tests positive for a protein called Human Epidermal growth factor Receptor 2 (HER2). This protein promotes the growth of cancer cells, and its presence indicates a more aggressive form of the disease. Treatment generally includes targeted therapies, which specifically affect HER2 cells.

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.

A hematologist is a medical doctor specialized in the diagnosis, treatment, and prevention of diseases related to the blood, including conditions affecting blood cells, bone marrow, blood vessels, and the lymphatic system. Their work can involve managing patients with blood disorders or illnesses such as anemia, clotting problems, and blood cancers.

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.

Heterogeneity refers to the presence of diverse and distinct characteristics within a particular group or system. In a medical context, it often describes the differences in cells, tissues, or diseases, indicating variability in genetic, molecular, or clinical features.

"High-grade" refers to a high level of quality or superiority in comparison to others. It signifies excellence, top-notch, premium or first-class. Used in various contexts such as medical to indicate severe or advanced stage of cancer, academic to imply excellent scores, or mining for rich mineral content.

"Hormone Receptor Status" refers to a clinical parameter determined in patients with certain types of cancers. It reveals whether the patient's cancer cells express specific proteins (hormone receptors) like estrogen and progesterone, signifying their dependency on these hormones for growth. This information influences the selection of optimal therapeutic strategies, informing decisions on hormone therapy use.

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.

"Hyperplasia" refers to an increased growth rate in an organism's cells leading to a rapid augmentation in the size of an organ or tissue. It's a common response to stimuli and not necessarily associated with cancer, but some forms could elevate cancer risk.

Hypofractionation is a method used in radiation therapy where the total dose of radiation is divided into large doses and treatments are given less often than traditional radiation therapy. This approach minimizes the treatment duration, potentially enhancing the convenience and effectiveness of the therapy.