Over 100 cases of 49,XXXXY syndrome have been published to date. Classic findings include radioulnar synostosis, hypogonadism, and mental retardation. The majority of reported cases have not ...

Klinefelter syndrome is a genetic condition that affects only males. Here's what you should know about the causes, symptoms, and treatment options for the condition. Klinefelter syndrome is a genetic ...

Apple allergies can occur, especially in people who are allergic to birch tree pollen. Up to 8% of children and 3% of adults may experience food allergies, including reactions to apples. The main ...