Volar dislocations of the thumb metacarpophalangeal joint are uncommon and can be associated with rupture of the ulnar collateral ligament (UCL). We report a case where a volar thumb dislocation was successfully closed reduced, but instability required open repair of the UCL. Early motion protocol helped achieve favorable results.

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Background Penetrating injuries to the hand are a common occurrence in the emergency room, and embedment of foreign bodies is suspected in many of these cases. The existing literature offers little information on retained foreign bodies. The aim of this study was to identify characteristics, determine prevalence, and observe outcomes for retained foreign bodies in the wrist and hand. Methods Four hundred thirty-seven consecutive hand and wrist radiographs in 437 patients from the emergency department of a level 1 trauma center were reviewed for the presence of retained foreign bodies. Location, size, number, and type of foreign body were recorded. Patient demographics, mechanism of injury, associated injuries, and treatment were obtained from medical records. All subsequent hospital and outpatient encounters were reviewed. Follow-up period was 18 months (range, 1-40). Results Of 437 cases, 65 patients (15 %) had at least one retained foreign body. Nineteen patients underwent removal of foreign body at initial presentation. The average size of foreign bodies removed was 6 mm, compared to 3 mm for those retained. Of 46 patients where the foreign body was left in situ, two (4 %) developed symptoms directly related to the retained foreign body. One of these patients underwent removal. Conclusions This study supports the safe removal of foreign bodies which are easily accessible or when part of a broader procedure to repair injured structures. Otherwise, we advocate expectant management for all other patients, as the likelihood of persistent symptoms is low and only 2 % of retained foreign bodies required removal later.