Commentary Strömberg et al. have presented the results of a fascinating study designed to determine the outcomes of treating Dupuytren disease with either collagenase or percutaneous needle fasciotomy (PNF). This is an important topic, of special interest to hand surgeons but also to the broader orthopaedic community because these kinds of analyses of 2 different treatment modalities are a crucial element in determining treatment value. Increasingly, proof of that value has become linked to reimbursement for treatment by both government and private payers. The authors made several noteworthy conclusions. First, they found no significant differences in outcomes between the 2 groups. Second, by 2 years after treatment, one-half of the cords crossing the proximal interphalangeal joints had disappeared. Third, using what I believe are flawed calculations, the authors considered the “cost” of using collagenase to be nearly 3 times the “cost” of PNF. Collagenase has been compared with needle aponeurotomy (also termed percutaneous needle fasciotomy [PNF]) before, with prior reports showing 1-year1 and 2-year2 follow-up data. Strömberg et al. presented 2-year follow-up data in more detail. One of the important aspects of this study is that all treatment was rendered by a single surgeon (J.S.). That could be a strength because it ensures consistent treatment, but it is more likely a weakness because it means that one cannot necessarily generalize the findings to a larger population or other centers. Additional study will be needed to resolve this. The finding that the proximal interphalangeal joint contractures improved in both groups even though the treatment was delivered at the level of the metacarpophalangeal (MCP) joint warrants special consideration. It was hypothesized that this might be because once the tension in the Dupuytren cord is removed, the cord tissue resorbs. Skov et al.2 proposed a similar theory. It is intriguing to theorize this treatment effect, but there is no proof; perhaps further study will substantiate or refute that hypothesis. Strömberg et al. calculated that the cost of collagenase was nearly 3-fold higher than that of PNF at their institution. That analysis is flawed. There are a facility fee and costs of other supplies and personnel if PNF is performed in a surgery center. In contrast, collagenase is designed to be used in an office setting so those additional costs are eliminated. The adverse effects of injecting collagenase have been reported on extensively, including in the trials conducted to gain Food and Drug Administration (FDA) approval for use in the U.S. Most of those “adverse” effects are inherent to any procedure for Dupuytren disease. Pain, swelling, and bruising are expected after surgical procedures regardless of whether they are percutaneous or open, but investigators were required to report them as “complications” in the Collagenase Option for the Reduction of Dupuytren’s (CORD) I and II studies3,4, for example. It is unfortunate that Strömberg et al. did not report on adverse effects because it would have been useful to note any important differences between the 2 treatment modalities along these lines. The technique used by Strömberg et al. included injecting methylprednisolone at the same time that the PNF was done. The effect of the steroid is another variable that was not controlled and therefore another open question requiring further study. The best treatment for Dupuytren contractures continues to be fiercely debated. Recently, this was reported by McMillan et al.5 and generated discussion among hand surgeons in an open forum format online (www.assh.org). The addition of the data presented by Strömberg et al. is extremely valuable in helping to clarify the issue. What is known is that Dupuytren disease is progressive. What is unknown is the pace of the progression; that is unique to each patient and even to each extremity of each patient. “Best” treatments remain uncertain. Someday, we may have a better biological solution to the disease, whether through injections or gene therapy. For now, we can continue on our quest to discern the ideal treatment for individual patients, understanding the pros and cons of each modality.
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