Skeleton of a man with fibrodysplasia ossificans
progressiva (FOP). Plates and ribbons of ectopic bone can be seen
directly on the skeleton.
Image Courtesy: © A.B. Shafritz et al., New Eng. J. Med.,
335 (8): 555-61, 1996, Massachusetts Medical Society.
Skeleton part of collections at the Mütter Museum, College
of Physicians of Philadelphia