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Knee dislocation following total knee replacement arthroplasty is a rare but serious complication. The incidence of dislocation following primary total knee arthroplasty with posterior stabilized implants ranges from 0.15 to 0.5%, and posterior dislocation after revision total knee arthroplasty is even rarer. Here, we report the case of a 76-year-old male who presented with posterior dislocation after posterior stabilized revision total knee arthroplasty. [ABSTRACT FROM AUTHOR]

Scaphocapitate fracture syndrome is rare, complex injury. We report an unusual presentation of scaphocapitate fracture syndrome, involving fracture of the scaphoid and capitate associated with volar dislocation of the lunate and scaphoid and the proximal fragment of the capitate in a 30-year-old male after a motor vehicle accident. Computed tomography was found to be helpful for achieving the correct diagnosis. Open reduction and internal fixation was performed. The scaphoid fracture was fixed using a headless compression screw, and the volar displaced proximal fragment of the capitate was reduced to its original position, but could not be fixed because of severe comminution. This case cautions that the capitate fragment should not be excised even when it cannot be fixed due to comminution. [ABSTRACT FROM AUTHOR]

Acute calcific tendinitis of the shoulder is a well-known condition, but it is rare in the rectus femoris origin. Mostly reported cases were occurred in the reflected head of the rectus femoris, and only few cases were in the direct head of the rectus femoris. Intraosseous marrow involvement of calcific tendinitis is a more rare condition; it often goes misdiagnosed as an infection or a neoplasm. We report a rare, unusual case of acute calcific tendinitis of the direct head of the rectus femoris associated with intraosseous marrow involvement of calcification in anterior inferior iliac spine with serial CT and MRI findings. Aggressive osseous change may occur in acute calcific tendinitis of the rectus femoris as in this case which should be made an appropriate diagnosis to avoid unnecessary investigation and overtreatment like a surgery. [ABSTRACT FROM AUTHOR]