Autoimmune Diseases Overview Autoimmune diseases are health conditions that happen when your immune system attacks your body instead of defending it. Healthcare providers sometimes call them autoimmune disorders. Usually, your immune system is like your body’s built-in security system. It automatically detects substances that shouldn’t be in your body (like viruses, bacteria or toxins) and sends out white blood cells to eliminate them before they can damage your body or make your sick. If you have an autoimmune disease, your immune system is more active than it should be. Because there aren’t invaders to attack, your immune system turns on your body and damages healthy tissue. Autoimmune diseases are chronic conditions. This means if you have an autoimmune disease, you’ll probably have to manage it and the symptoms it causes for the rest of your life. Types of autoimmune diseases There are more than 100 different autoimmune diseases. They can affect almost any tissue or organ in ...
Description Aromatase excess syndrome is a condition characterized by elevated levels of the female sex hormone estrogen in both males and females. Males with aromatase excess syndrome experience breast enlargement (gynecomastia) in late childhood or adolescence. The bones of affected males grow and develop more quickly and stop growing sooner than usual (advanced bone age). As a result males have an early growth spurt, typically during late childhood, with short stature as an adult. Affected females rarely show signs and symptoms of the condition, but they may have increased breast growth (macromastia), irregular menstrual periods, and short stature. The ability to have children (fertility) is usually normal in both males and females with aromatase excess syndrome. Causes Rearrangements of genetic material involving the CYP19A1 gene cause aromatase excess syndrome. The CYP19A1 gene provides instructions for making an enzyme called aromatase. This enzyme converts a class of hormones ca...