About XIAFLEX XIAFLEX (collagenase clostridium histolyticum or CCH) is a biologic approved in the U.S., EU and Canada for the treatment of adult Dupuytren's contracture patients with a palpable cord. XIAFLEX is a minimally invasive treatment for this condition and consists of a highly purified combination of subtypes of collagenase, derived from Clostridium histolyticum, in a specific proportion. Together, the collagenase sub-types work synergistically to break the bonds of the triple helix collagen structure more effectively than human collagenase. XIAFLEX is currently under review by the FDA for the treatment of Peyronie's disease. CCH is also in phase IIa of development for the treatment of Frozen Shoulder syndrome (adhesive capsulitis) and in phase Ib of development for the treatment of cellulite (edematous fibrosclerotic panniculopathy).About the Phase Ib Cellulite trial The phase Ib study is a single site, open-label dose-escalation study that enrolled 99 women between 21 and 60 years of age. The objectives of the study are to assess the safety and effectiveness of CCH for the treatment of EFP at 30, 60 and 90 days following a single dose, as well as evaluation of pharmacokinetics, to determine if a path forward exists into a later phase of development. To qualify for the study participants must have had EFP in the posterolateral thighs and/or buttocks for at least 12 months prior to a screening visit. Following screening and determination of eligibility, study participants were assigned to one of eleven groups that varied in treatment dose, injection concentration and volume. Subjects received 10 concurrent injections (0.1 or 0.5 mL per injection) of CCH via a standardized template over a targeted area (8 cm x 10 cm) of EFP. The template included a targeted centralized dimple. The total dose of CCH that was administered into the targeted area ranged between 0.0029 mg and 0.464 mg; these doses represent between 0.5% and 80% of the dose used in a single injection for Dupuytren's contracture (0.58 mg). Safety will be evaluated through the collection of adverse events, as well as a targeted assessment of local reactions to the treatment through 90 days. The treatment effectiveness will be evaluated by investigator and patient assessments, as well as 3-D photographic imaging techniques.