A graduate of the University of California, San Diego, Dr. McKenna received his medical degree from the University of Southern California School of Medicine in Los Angeles prior to joining Mass. Eye and Ear/Harvard Medical School for his residency in otolaryngology. Subsequently, he received subspecialty training at the House Ear Institute as a neurotology and skull base surgery fellow. Upon competition of his training in 1989, Dr. McKenna joined the Department of Otolaryngology at Harvard Medical School and is now a Professor of Otolaryngology.