As a radiologist, I have few clinical pearls to offer, but let’s talk about anatomical plurals! 

This post all started when we were trying to discuss a fascinating case involving the male external reproductive organs, but we were all stumbling over the terms. So… one penis has a corpus spongiosum, two corpora cavernosa (each with a crus), a urethra, and a glans penis, but two penes contain two corpora spongiosa, four corpora cavernosa (four crura), two urethrae, and two glandes penium? And the corresponding scrota contain pairs of testes and epididymides, respectively susceptible to orchitides and epididymitides??

Penile jokes aside, let’s learn how to pluralize some anatomy!  (Disclaimer: This is a humor piece; I have no linguistics training.)