I always enjoy discovering new anatomical anomalies in my reading, such as this one from a novel by Douglas Boren. This is the opening, first paragraph of the novel:
With her heart in her throat, Maggie ran down the great hallway, summoned by her master’s stern voice. Lord Myron Victor of Cheswyck brooked no tardiness, laziness, nor excuses.
It's listed as Historical Fiction, but I imagine one could easily place this in science fiction. I'm presuming the heroine didn't choke to death, although one could argue that she was already dead. Or do I presume too much?

Any eyeballs-in-the-armpit novels out there?
Don