What is ketonuria Ketonuria occurs when high levels of ketone bodies (acetone, acetoacetate, and beta-hydroxybutyrate) which occur when fatty acids are broken down for energy

What is Lesch Nyhan syndrome Lesch-Nyhan syndrome is a rare, inherited disorder characterized by neurological and behavioral abnormalities and the overproduction of uric acid in

What is lethargy Lethargy is another word for fatigue, which is a feeling of weariness, tiredness, exhaustion or lack of energy. Lethargy is different from drowsiness.

What is lentigo Lentigo is a pigmented flat or slightly raised lesion with a clearly defined edge. Unlike an ephelis (freckle), lentigo does not fade in

What is laparotomy Laparotomy is a major surgical procedure that involves cutting into the abdomen to gain access to the peritoneal cavity ((Rajaretnam N, Burns

What is letrozole Letrozole is a nonsteroidal aromatase inhibitor which effectively blocks estrogen synthesis in postmenopausal women and is used as therapy of estrogen receptor

What is laryngeal cancer Laryngeal cancer is malignant (cancerous) cells that form in the larynx (voice box). The larynx, or voice box, is located in

What is laryngomalacia Laryngomalacia also known as “floppy airway” or laryngealmalacia, is a congenital (present at birth) softening of the tissues of the larynx (voice box)

What is lanugo hair Lanugo is the first type of hair to develop in humans. Lanugo arises at about 3 months into development. Lanugo hair

What is inverse psoriasis Inverse psoriasis also known as intertriginous psoriasis or flexural psoriasis, shows up as very red, smooth, and shiny lesions in body