From the case:
DIP joint (histology)
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Distal interphalangeal joint from amputation of toe. There was extensive soft tissue necrosis and inflammation, but the bones and joints were normal. Distal phalanx to the right; middle phalanx to the left.
Case Discussion
Photo credit: Ed Uthman
Original file (Flickr): here
License: Attribution 2.0 Generic (CC BY 2.0)