Lobular carcinoma in situ is a noninvasive breast condition in which abnormal cells are found in the lobules, the milk-producing glands of the breast. Despite its name, lobular carcinoma in situ is not a true cancer but rather a marker indicating an increased risk of developing invasive breast cancer in the future. It is often discovered incidentally during a breast …

Lactose intolerance is a digestive condition in which the body is unable to fully digest lactose, a natural sugar found in milk and dairy products. This happens when the small intestine does not produce enough lactase, the enzyme needed to break down lactose into simpler sugars that can be absorbed into the bloodstream. When lactose is not properly digested, it …

Knee pain is a common condition that affects people of all ages and can range from mild discomfort to severe pain that interferes with daily activities. It may result from injury, overuse, aging, or underlying medical conditions. Knee pain can involve bones, cartilage, ligaments, tendons, or surrounding muscles, and proper evaluation is important to determine the cause. Symptoms Symptoms of …

Klippel-Trenaunay syndrome is a rare congenital vascular disorder present at birth. It is characterized by abnormal development of blood vessels, soft tissues, and bones, most commonly affecting one limb. The condition is not inherited and usually occurs due to a genetic change during early fetal development. Symptoms and severity vary widely among individuals. Symptoms Symptoms of Klippel-Trenaunay syndrome are usually …

Klinefelter syndrome is a genetic condition that affects males and occurs when an individual is born with one or more extra X chromosomes, most commonly 47,XXY instead of the typical 46,XY. The condition can affect physical development, hormone levels, and fertility. Many individuals with Klinefelter syndrome are not diagnosed until adolescence or adulthood due to mild or subtle symptoms. Symptoms …

Mononucleosis, commonly called mono, is an infectious illness most often caused by the Epstein-Barr virus. It is sometimes referred to as the kissing disease because it spreads mainly through saliva. Mononucleosis is more common in teenagers and young adults, but it can affect people of all ages. The condition usually causes fatigue, fever, and sore throat, and symptoms can last …

Kidney stones are hard mineral and salt deposits that form inside the kidneys when urine becomes concentrated. This allows minerals to crystallize and stick together. Kidney stones can vary in size and may pass through the urinary tract unnoticed or cause severe pain when they move or block urine flow. The condition is common and can affect people of all …

A kidney infection, also known as pyelonephritis, is a serious type of urinary tract infection that affects one or both kidneys. It usually begins in the bladder or urethra and travels upward to the kidneys. Kidney infections require prompt medical treatment, as delayed care can lead to permanent kidney damage or life-threatening complications. Symptoms Symptoms of a kidney infection often …

Seborrheic keratosis is a common, noncancerous skin growth that typically appears in adults as they age. These growths develop on the outer layer of the skin and can vary in color from light tan to dark brown or black. They often have a waxy, scaly, or slightly raised appearance and may look as though they are stuck onto the skin. …

Overview Keratosis pilaris is a common, harmless skin condition that causes small, hard bumps on the skin’s surface. Often referred to as “chicken skin” due to its distinctive appearance, this condition occurs when keratin, a protein that protects skin from infections and harmful substances, builds up and blocks hair follicles. The result is rough patches of tiny bumps that typically …