A red pigment found predominantly in tomatoes (and also in some other fruits) that gives them their color. Lycopene has antioxidant properties and has been claimed to “promote a healthy heart” and to reduce the risk of cancer. Lycopene has not, however, been proven to contribute to the anticancer properties of tomatoes. In fact, there is evidence that it is not lycopene but something else in tomatoes that is responsible. Numerous other potentially beneficial compounds are present in tomatoes. The lower risk of cancer associated with higher consumption of tomatoes and tomato-based products supports current dietary recommendations to increase fruit and vegetable consumption.
- Lyme disease
early localized disease with skin inflammation; early disseminated disease with heart and nervous system involvement, including palsies and meningitis; and late disease, featuring motor and sensory nerve damage and brain inflammation and arthritis. Within hours to weeks of the tick bite, an expanding ring of unraised redness develops, with an outer ring of brighter redness […]
The almost colorless fluid that travels through the lymphatic system, carrying cells that help fight infection and disease.
- Lymph node
One of many small, bean-shaped organs located throughout the lymphatic system. The lymph nodes are important in the function of the immune response and also store special cells that can trap cancer cells or bacteria that are traveling through the body through the lymph. Also known as lymph gland.
- Lymph node, sentinel
The first lymph node to receive lymphatic drainage from a tumor. The sentinel node for a given tumor is found by injecting a tracer substance around the tumor. This substance then travels through the lymphatic system to the sentinel node. The tracer substance may be a blue dye that can be tracked visually or a […]
- Lymphadenitis, regional
Cat scratch disease, a mild flu-like infection, with swollen lymph nodes (lymphadenitis) and mild fever of short duration, due to cat scratches, especially from kittens. There is usually a little bump (a papule) which may be pus-filled (a pustule) at the site of the scratch. The infection is self-limited and usually goes away by itself […]