Alkaptonuria, also known as ochronosis, is a rare genetic disorder that affects the body's ability to process certain proteins. It is caused by a defect in an enzyme called homogentisic acid oxidase, which results in the buildup of a chemical called homogentisic acid in the body. The primary symptom of alkaptonuria is a darkening of the skin, especially in areas that are exposed to the sun. Other symptoms include joint pain and stiffness, arthritis, and kidney and urinary tract problems.
Symptoms of Alkaptonuria
The primary symptom of alkaptonuria is a darkening of the skin, especially on areas that are exposed to the sun. This darkening, called ochronosis, is caused by the buildup of homogentisic acid in the body. Other symptoms include joint pain and stiffness, arthritis, and kidney and urinary tract problems.
Joint Pain and Stiffness
People with alkaptonuria often experience joint pain and stiffness. This is caused by the buildup of homogentisic acid in the joints, which can lead to joint damage and arthritis.
Kidney and Urinary Tract Problems
People with alkaptonuria can also experience kidney and urinary tract problems, such as kidney stones, bladder infections, and kidney failure.
Diagnosis of Alkaptonuria
Alkaptonuria is diagnosed through a urine test that measures the amount of homogentisic acid in the urine. A genetic test can also be used to confirm the diagnosis.
Treatment of Alkaptonuria
There is no cure for alkaptonuria, but early diagnosis and treatment can help reduce symptoms and slow the progression of the disease. Treatment may include medications to reduce joint pain and stiffness, physical therapy, and lifestyle changes.