Alkaptonuria is a rare genetic disorder caused by a mutation in the enzyme homogentisic acid oxidase. This mutation prevents the body from breaking down homogentisic acid, leading to an accumulation of the substance in the body.
The most common symptom of alkaptonuria is a darkening of the urine, which can range from yellow to brown. This discoloration is due to the buildup of homogentisic acid in the urine. Other common symptoms include joint pain, arthritis, and a bluish-gray discoloration of the skin, especially around the ears, nose, and eyes.
The buildup of homogentisic acid can cause deposits in the connective tissues throughout the body, leading to joint pain, stiffness, and arthritis. These deposits can also lead to changes in the heart, kidneys, and blood vessels. Over time, the buildup of homogentisic acid in the body can cause kidney failure, heart failure, and other serious complications.
Early diagnosis of alkaptonuria is important, as treatment options can help reduce the buildup of homogentisic acid and manage the symptoms. Treatment may include medications to slow the progression of the disorder, physical therapy for joint pain, and lifestyle changes to improve overall health.