Could a hernia in the abdominal be mistaken as fat? The black area? In a CT of abdomem-pelvis w/oral contrast.

Hernias are gaps. Since a hernia itself is a gap in muscle or sometimes in the middle of other tissues fat and other things like intestine can squeeze through this gap. Fat in a hernia defect is not dangerous but can cause pain.Even a small amount of trapped fat can cause pain. This is why ct scans do not always help in diagnosing hernias as there are many areas of naturally occurring fat that are around muscles.
No. A hernia is easily detected on ct. It is a defect in the abdominal wall. It may contain fat, but should not be mistaken.