Fibrodysplasia Ossificans Progressiva
Picture of the skeleton of Harry Eastlack. Death recorded a few days prior to 40th birthday.
I've been searching for this picture for years, since back when I intended to go into med tech and encountered this during an A&P lecture. All I remember is that the teacher said "ankylosing", but apparently I missed that it was related to a disease other than AS, as I'd been mistakenly assuming all these years.
Fig. 1. Clinical Photograph and Skeleton of a Man with Fibrodysplasia Ossificans Progressiva. The rigid posture noted in this 25-year-old man with fibrodysplasia ossificans progressiva is attributable to ankylosis of the spine, shoulders, and elbows. Plates and ribbons of ectopic bone contour the skin over the back and arms (A), and can be visualized directly on the skeleton (B) (after death from pneumonia at age 40 years). Courtesy, Mütter Museum, College of Physicians of Philadelphia. Reprinted from the New England Journal of Medicine .