Some of the most unusual syndromes found around the world occur only within a specific culture. This hour, we’ll talk about these maladies with Frank Bures, who visited Nigeria, Hong Kong, Singapore, Borneo and other stops in search of answers. He writes about what he learned in “The Geography of Madness: Penis Thieves, Voodoo Death, and the Search for the Meaning of the World’s Strangest Syndromes” (Melville House).