Clinical Definition Hairy cell leukemia (HCL) is a cancer of the bone and blood marrow characterized by the bone marrow overproducing lymphocytes. The rare cancer either progresses slowly or not at all, with fever, weakness and fever among the symptoms. Treatments may include chemotherapy, surgery, stem cell transplants or biologic therapy to boost the immune…
Halitosis
Clinical Definition Halitosis is a dental health condition characterized by odorous breath. It may occur due to oral pathology, such as poor oral hygiene, dental infections and gum disease. Some systemic diseases, such as renal and kidney disease, may also cause halitosis. In other instances, halitosis is the result of ingestion of certain foods. In…
Hammertoe
Clinical Definition Hammertoe or hammertoe syndrome describes a sometimes-painful condition in which a toe bends, curling up and under, resembling a hammer. The toe is initially still flexible, but as the condition progresses, it may become rigid and require surgical intervention. In Our Own Words Hammertoe, also called hammertoe syndrome, can be caused by a…
Hashimoto’s Disease
Clinical Definition Hashimoto’s disease, or chronic thyroiditis, is a common thyroid gland disorder triggered by an autoimmune reaction against the thyroid gland, which can prevent it from producing sufficient amounts of thyroid hormone. Signs and symptoms of thyroid deficiency include poor concentration, temperature intolerance, and weight gain. Diagnosis is aided by blood tests that measure…
Hay Fever
Clinical Definition Hay fever, also called seasonal allergic rhinitis or simply rhinitis, is the most prevalent type of allergy. It is caused by an IgE-mediated immune response to allergens that are airborne and inhaled. The condition is marked by sneezing, a runny nose and itching. Avoiding exposure to the allergen; taking over-the-counter or prescription medicines;…