M ost of the time, Whitney Weldon doesn’t think about her second skeleton. She was 9 the first time it really flared up. Bridges of bone grew from nowhere to freeze her right arm at a 120-degree angle, an excruciating experience that felt “like your bones are trying to come out of your skin,” she said. A decade later, her second skeleton sprouted struts of bone that locked the other arm in place, this time at 180 degrees.

Read the source article at statnews.com