Background: Treatment with injection of collagenase Clostridium histolyticum (CCH) has been recognized as an effective option for the Dupuytren's contracture (DC) in Europe and North America. However, there are no studies describing mid-term efficacy of CCH treatment in East-Asian population. The purpose of this study was to assess 2-year outcomes following CCH treatment in Japanese patients.
Methods: Twenty hands (28 joints) from 18 DC patients underwent CCH injection with manipulation according to the product specifications with 2-year follow-up. Patients were assessed for extension deficit on treated metacarpophalangeal (MCP) and/or proximal interphalangeal (PIP) joints before treatment, at 4 weeks and 2 years after the treatment.
Results: At 4 weeks after CCH treatment, contracture of treated joints significantly improved from the mean extension deficit of 45° before treatment to 3° for MCP joints, and from 41° to 14° for PIP joints (P < 0.001, <0.001, respectively). Improved contracture was maintained with 4° and 23° at 2 years after CCH treatment (P < 0.001, <0.05, respectively). Successful correction defined as ≤ 5° extension deficit was obtained in 14/16 MCP and 5/12 PIP joints at 4 weeks; of these, 11 MCP and 1 PIP joints maintained the corrected range of motion at 2-year follow-up.
Conclusion: CCH treatment could be a useful option to improve contracture in Japanese patients. During 2-year follow-up, this treatment could provide comparable effect durability to previous studies from Western countries. Moreover, our results support the evidence that better correction of the contracture can be obtained in the MCP joints than PIP joints after CCH treatment.
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