Actinic keratosis, also called solar keratosis, is a colored scaly patch that develops on the skin due to years of exposure to strong UV light from the sun. It is often a precancerous condition, which means it can progress to cancer if left untreated.

Adenoid Cystic Carcinoma (ACC) is a rare type of cancer that typically occurs in secretory glands. It most commonly forms in the salivary glands and may metastasize areas of the head and neck.

Achondroplasia is a type of dwarfism characterized by small limbs. The word means “lack of cartilage formation.” Cartilage is a tough but flexible tissue that accounts for a large portion of the skeleton during early growth stages.

Agoraphobia is an anxiety disorder characterized by a fear of being in situations that may be difficult or impossible to escape. People with this condition often avoid situations they believe could trigger their anxiety, such as crowded public spaces or public transportation.

Bursitis is a condition that usually affects the joints, and more specifically, the bursae—fluid-filled sacs that work as cushions between the tendons, bones, and muscles. This condition develops due to inflammation in these fluid-filled sacs.

Alkaptonuria, also called black urine disease is a rare inherited disorder resulting from an autosomal recessive genetic condition. Having two faulty copies of a gene called HGD leads to this condition.

Acute Flaccid Myelitis (AFM) is a serious neurological disease. It is a rare condition that affects the spinal cord and leads to sudden weakness of the muscle and poor reflexes, resulting in paralysis.

Anal cancer is a rare cancer that begins in the anus, the opening at the end of the rectum. Its appearance is usually uncommon before age 35, but it is more frequently observed in men.