Collagenase Option for Reduction of Dupuytren's Contracture in Japan

Inclusion Criteria:

* At least 20 years old when written informed consent is obtained.
* Having a diagnosis of Dupuytren's contracture and flexion contracture due to palpable cord in at least 1 non-thumb finger (20° to 100° in MP joint and 20° to 80° in PIP joint).
* Positive tabletop test result (i.e., cannot simultaneously place affected finger and palm on a table).
* Voluntary written informed consent is obtained.

Exclusion Criteria:

Patients meeting any of the following criteria will be excluded:

* Is pregnant, may be pregnant, wishes to become or could become pregnant during the study (i.e., unless acceptable contraception is used, the patient has been sterilized, or the patient is postmenopausal \[no menstrual period for at least 12 months without any other medical cause\]), or is breastfeeding.
* Has a coexisting chronic disease of the hand that could impact assessment (muscular disease, neurological disease, neuromuscular disease).
* Has received another investigational product 30 or fewer days before first injection of the investigational product.
* Has undergone aponeurectomy, aponeurotomy, needle aponeurotomy/fasciotomy, verapamil/interferon injection, or another Dupuytren's Contracture treatment of the primary joint 90 or fewer days before first injection of the investigational product.
* Is allergic to collagenase or any of the excipients of AK160.
* Has taken tetracycline derivative such as minocycline and doxycycline 14 or fewer days before first injection of the investigational product.
* Has received a collagenase product 30 or fewer days before first injection of the investigational product.
* Is currently taking or has taken, 7 or fewer days before first injection of the investigational product, an anticoagulant or antiplatelet drug (other than ≤150 mg/day of aspirin).
* Has suffered a recent stroke, hemorrhage, or other disease affecting the hands.
* Has a serious disease unsuited for the study.
* Receiving treatment for a malignancy.
* History of drug or alcohol addiction within the past 5 years or history of drug or alcohol abuse within the past year.
* Has received previously the investigational product (AK160, AA4500, XIAFLEX®, or XIAPEX®).
* Otherwise found ineligible as a subject by the investigator.