Humans have a tendency to see faces everywhere—including in medical images. In my book I note a paper in the Journal of the Royal Society of Medicine titled “The Case of the Haunted Scrotum.” J. R. Harding, a British radiologist, performed a CT scan on a patient with an undescended right testicle. On the left side he saw a “screaming ghostlike apparition” (click to enlarge). On the right, no testicle was found. “If you were a right testis,” he wrote, “would you want to share the scrotum with that?” Continue reading →