Each of the two paired sphenoidal sinuses is contained within the body of the sphenoid vary in size and shape; owing to the lateral displacement of the intervening septum they are rarely symmetrical.
Each of the paired sphenoidal sinuses, which are also paranasal sinuses is contained within the body of the sphenoid. They vary in size and shape and owing to the lateral displacement of the intervening septum they are rarely symmetrical.