What are cutaneous preparations?

They are the compound direct object of the setup line of a lame joke.

Encephalography may refer to: Electroencephalography Hemoencephalography Magnetoencephalography http://en.wikipedia.org/wiki/Encephalography

A meal preparation is when you or somebody prepares something for them and their family to eat.

A cutaneous ureterostomy, also called ureterocutaneostomy, is a surgical procedure that detaches one or both ureters from the bladder, and brings them to the surface of the abdomen with the formation...

Christmas, usually