To evaluate long-term efficacy and safety of collagenase clostridium histolyticum (CCH) after the third year of a 5-year nontreatment follow-up study, Collagenase Option for Reduction of Dupuytren Long-Term Evaluation of Safety Study. This study enrolled Dupuytren contracture patients from 5 previous clinical studies. Beginning 2 years after their first CCH injection, we re-evaluated patients annually for joint contracture and safety. Recurrence in a previously successfully treated joint (success = 0° to 5° contracture after CCH administration) was defined as 20° or greater worsening in contracture in the presence of a palpable cord or medical/surgical intervention to correct new or worsening contracture. We assessed partially corrected joints (joints reduced 20° or more from baseline contracture but not to 0° to 5°) for nondurable response, also defined as 20° or greater worsening of contracture or medical/surgical intervention. Of 1,080 CCH-treated joints (648 metacarpophalangeal [MCP]; 432 proximal interphalangeal [PIP]; n = 643 patients), 623 (451 MCP, 172 PIP) had achieved 0° to 5° contracture in the original study. Of these joints, 35% (217 of 623) recurred (MCP 27%; PIP 56%). Of these recurrences, an intervention was performed in 7%. Of the 1,080 CCH-treated joints, 301 were partially corrected in the original study. Of these, 50% (150 of 301; MCP: 38% [57 of 152]; PIP: 62% [93 of 149]) had nondurable response. We identified no new long-term or serious adverse events attributed to CCH during follow-up. Anti-clostridial type I collagenase and/or anti-clostridial type II collagenase antibodies were reported for 96% or more of patients who received 2 or more CCH injections and 82% who received 1 injection. The recurrence rate, which is comparable to other standard treatments, and the absence of long-term adverse events 3 years after initial treatment indicate that CCH is an effective and safe treatment for Dupuytren contracture. Most successfully treated joints had a contracture well below the threshold for surgical intervention 3 years after treatment. Recurrence rates among successfully treated joints were lower than nondurable response rates among partially corrected joints. Therapeutic IV.
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