The crisscross injury mechanism explains the mirror pathogenesis of the traumatic fracture dislocation of the distal and proximal radioulnar joints with intact shaft of the radius and ulna. Co-existing subluxation or dislocation of the other radioulnar articulation must not be overlooked in cases of fracture dislocation of one radioulnar joint. Two types of crisscross injury of forearm bones are proposed.

Solitary dislocation of the scaphoid can be classified as simple, or complex if the distal carpal row is included. It may be total or partial. Partial dislocation of the proximal pole may occur in a radial, palmar or dorsal direction. Each type has a different significance in terms of surgical approaches, complications and prognosis.

Tuberculous osteomyelitis is an uncommon disease entity. We report two cases of tuberculous infection of the scapula, one involving the acromion and one involving the body of the scapula. Tuberculosis is still an important differential diagnosis in unusual or chronic bone conditions. Rèsumè Nous rapportons deux cas d'infection tuberculeuse de l'omoplate, l'un atteignant l'acromion, l'autre atteignant le corps de l'omoplate. La tuberculose est encore un diagnostic différentiel important des maladies rares ou chroniques des os.

A 47-year-old, right-hand dominant electrical worker was admitted to the emergency department of our hospital, after injury of the left wrist by a fallen metal bar at work. Clinical examination revealed swelling and tenderness at the left distal ulna. Distal neurovascular status was intact. Anteroposterior and lateral wrist radiographs demonstrated an isolated distal ulnar fracture with displacement ( Figure 1). Distal ulnar fracture nonunion management: An uncommon case report Chi Kin Lo and Wing Lok KamAbstract Introduction: Isolated distal ulnar fracture is an uncommon injury. Only a few case series that look into the management of ulnar fracture nonunion have been reported in the literature. Case presentation: A middle-aged manual worker presented to us for isolated fracture of his left distal ulna. He received open reduction and fixation of the distal ulnar fracture using distal ulna locking plate. It was complicated with nonunion and he complained of persistent wrist pain. This distal ulnar fracture nonunion was finally treated by SauveKapandji procedure with good functional outcome. Discussion: Displaced distal ulnar fracture should be reduced anatomically with rigid fixation to prevent disruption of the distal radioulnar joint. Fracture nonunion was traditionally managed with revision osteosynthesis and bone grafting. It is, however, technically difficult at the distal ulnar region because of the poor bone stock and lack of soft tissue coverage. Conclusion:We have demonstrated that the Sauvé-Kapandji procedure is a good treatment alternative for distal ulnar fracture nonunion.

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