The sphenoid bone (wasp bone) is part of the base of the skull Medically reviewed by Anita C. Chandrasekaran, MD, MPH An unpaired bone located in the cranium (or skull), the sphenoid bone ...

A foramen ovale is a hole in the heart. The small hole naturally exists in babies who are still in the womb for fetal circulation. It should close soon after birth. If it doesn’t close ...

A patent foramen ovale is an opening that some adults have between the top two chambers of their hearts. Everyone has this opening early in life, but it often seals during infancy. In some people ...