Eczema traumatica. Self-induced by religious pervert at St. Elizabeth's Hospital, Washington D.C. Wax model. [Skin Diseases. Also Dermatology. Models and modelmaking. Made by Wallis of the Army Medical Museum.] (Reeve 000669-1)Found--with caption!--on the astounding National Museum of Health and Medicine Flickr page. You can see more by clicking here and you can visit their wonderful blog, A Repository for Bottled Monsters, by clicking here. Click on image to see much larger version.
Thanks, Mike, for the tip!