First-Ever Gorilla Mastoidectomy Successful

A significant medical milestone was achieved at the San Diego Zoo Safari Park when Mizani, a 12-year-old lowland gorilla, received the first-ever mastoidectomy performed on his species. The procedure took place on March 26, 2026, at the park's Harter Veterinary Medical Center.

Mizani began exhibiting symptoms such as loss of appetite and difficulty opening his mouth around March 14, 2026. A CT scan revealed the cause to be mastoiditis, a bacterial infection behind the ear, and sinusitis. These conditions were likely present before Mizani arrived at the park earlier in 2026.

After initial medication proved ineffective, a team of specialists, including otolaryngologists from the University of California San Diego, performed the mastoidectomy. This complex surgery involves removing diseased cells from the mastoid bone, located behind the ear.

The collaborative effort, involving veterinary staff and surgical experts, was a success. Mizani is currently recovering and shows a promising health outlook, marking a significant advancement in veterinary medicine for primates.