Wait Michael! That would mean that somehow the scalp somehow violates the theory of gravity. Never mind that local lymph nodes in the head are not enlarged. Nevermind that their is no external evidence for edema. Nevermind that fact that not every man has spongiosis at the histological level. Go to any given family physician someday. You'll probably see a handful of diatetics come in for med check-up. Not only will you learn what edema looks like, but you will learn about the extremes of edema. There is not edema in the scalp.