Barbie and Ken

Ken is a senior in high school who some would argue has everything. His parents are loaded and gave him a Porsche 911S on his 16th birthday. He is a gifted athlete and has lettered in non-contact sports, golf, tennis, track and even pitches for his school team. Unfortunately, he is also known as having a certain “bouquet” about him – you can smell him coming a mile away. Ken falls madly in love with the head cheerleader, appropriately named Barbie, and ultimately asks her out on a date. He proposes seeing a remake of the Rocky Horror Picture Show, where “Meat Loaf sings Bat Out of Hell”, but Barbie insists on going to a Taylor Swift concert. She also insists on first watching the Kansas City Football team’s game on television instead of Ken getting to see the televised Ryder’s cup playoffs. Ken so much wants to go out with Barbie that he agrees, although he is no fan of Travis Kelce – he considers Rob Gronkowski the G.O.A.T. The big days arrives and Ken goes to Barbie’s house where her father opens the door. The father is overwhelmed by Ken’s smell and experiences the rapid onset of nausea; he rushes away to avoid an incident. Barbie’s mother is much more tolerant, but is still overwhelmed. She too dashes away because of the smell. After applying Vaseline to their noses, Barbie’s parents ask her what is going on? Barbie responds that she is not certain, but she knows that Ken had brain surgery in 9th grade, something about a meningioma, and it was around that time that his bad smell began. Seems that Ken cannot smell himself and all the kids slowly developed tolerance to his unusual aroma. “It is really not that bad” Barbie states, especially after he showers. Based on this description, where do you suspect the meningioma was located that is the root of Ken’s special fragrance?

Where was the meningioma that led to an effect on smell?