Trans-blepharoplasty orbitofrontal craniotomy for repair of lateral and posterior frontal sinus cerebrospinal fluid leak.
From the sciencedaily.com
One distinctive trait that Ouranopithecus shares with the humans and other modern African apes is the frontal sinus, a cavity in the forehead.
From the en.wikipedia.org
Another veteran in the suit, Bruce Price, alleged that military doctors implanted something in a sinus cavity near his brain's frontal lobe in 1966 that remains there today.