A new mitochondrial disease has been identified after a pair of identical twins were showing an unusual symptom. Despite eating far more calories than needed, the twins were underweight. Doctors ...

Conjoined twins are twins — two babies — that are physically connected to one another. They may be connected at the chest, abdomen, head, or some other part of the body and often share organs in these ...

These twins are not only seeing double – they’re feeling double, too. A teenage girl from Scotland has been suffering from symptoms of her identical twin’s cancer – but doctors say there’s nothing ...

INDIANAPOLIS — The arrival of identical twin sisters by C-section last week at IU Health's Riley Hospital marks a medical milestone. The girls, each weighing a little more than 3 pounds, are the first ...