Retained Foreign Body Which Should be Suspected as a Cause of Retractable Chronic Hand Inflammation and Diagnostic Capacity of Ultrasonography.

Background: Foreign bodies in the hand are common but easily and often missed in the initial evaluation of injury. Diagnosing retained foreign bodies is difficult due to radiolucent foreign bodies. Purpose of this study is to emphasize the need of consideration of foreign bodies in patients with chronic synovitis in hand. Methods: Twenty-five patients who had retained foreign body in soft tissue of hand with chronic inflammation symptoms were included. Ultrasonography was conducted in all of the patients. Patient age, sex, localization of foreign body, duration of symptom, history of injury, follow up period, complication, and biopsy results were recorded and reviewed. Also, patients' demographics and clinical results were retrospectively reviewed. Results: Nine of the 25 patients diagnosed with a foreign body in the hand did not remember the initial presentation of injury. The average symptom duration (from injury to hospitalization) was 10.5 months (range 1-96 months). The middle finger and the proximal interphalangeal joint were the most common site of a retained foreign body (10 patients). All patients were diagnosed via ultrasonography and underwent surgery. Biopsy results showed mainly chronic inflammation, fibrosis, granuloma, and foreign bodies. Conclusions: Patient with symptoms of cellulitis, osteomyelitis, and palpable mass in hand for over a month without a diagnosis should be suspected of retained FBs.