Peyronie's Disease (PD) is a fibrosing disorder of the penis where scar tissue (composed of excessive and disorganized collagen) known as a "plaque," forms along the shaft of the penis. This plaque can lead to permanent penile deformity (curvature, narrowing, indentation, hinging), loss of penile length, erectile dysfunction, and pain during intercourse. Research has shown PD to negatively impact the quality of life and cause significant psychosocial distress for many men.

At present, available medical and surgical treatment modalities for PD have limitations. Intralesional collagenase clostridium histolyticum (CCh) is approved for the reduction of penile curvature in PD, however, its use is restricted to the United States market. Other medical therapies including intralesional verapamil and interferon injections have inconsistent and modest effects while, invasive surgical management with plication or grafting can result in erectile dysfunction, penile length shortening, penile sensory changes, and harvest site complications.

Fractional CO2 Laser Therapy is an extra-dermal (applied to the surface of the skin) and non-invasive treatment that involves the use of lasers to destroy and reduce abnormal collagen in scarred tissue. Most recently, it has been used in a pilot clinical trial investigating its use in the management of PD. All men in this study safely experienced reduction in their penile curvature.

This will be a phase 1 clinical trial evaluating the safety and feasibility of using a fractional CO2 laser in the management of chronic phase PD. Enrolled study participants will undergo an initial clinical assessment of their PD which involves penile measurements at flaccid and erect states, a curvature assessment with duplex ultrasound, and will be asked to complete the International Index of Erectile Function Questionnaire (IIEF-5), and Peyronie's Disease Questionnaire (PDQ). They will then undergo 3 laser therapy sessions at 6 week intervals and will have a short and long-term follow-up of 24 and 52 weeks, respectively.

Inclusion Criteria:

1. Men 18 or older. For heterosexual men it is required they be in a stable relationship with a female spouse/partner for at least 3 months and willing to have vaginal intercourse for purposes of properly filling out the validated PD Questionnaire.
2. Diagnosis of PD for at least 12 months with evidence of stable disease as determined by the investigator (i.e. no change in penile curve for at least 6 months and absence of pain).
3. Penile curvature of 30º-90º in the dorsal, lateral, or dorsal/lateral plane (must be possible to delineate the single plane of maximal curvature for evaluation)
4. Signed informed REB-approved consent agreement; signed authorization form to allow disclosure of protected information.
5. Ability to read, complete, and understand the various rating instruments in English.

Exclusion Criteria:

1. Penile curvature of <30º or >90º
2. Any conditions affecting the penis such as a chordee in the presence or absence of hypospadias; thrombosis of the dorsal penile artery; infiltration by a benign or malignant mass or an infectious agent; ventral curvature from any cause; presence of an active sexually transmitted disease.
3. Failure to achieve a sufficient 8/10 erection (after prostaglandin E or Trimix administration), in the opinion of the investigator, to accurately measure the penile deformity.
4. Calcified plaque as evident by appropriate radiographic evaluation, i.e., penile ultrasound that would prevent treatment with Fractional CO2 Laser
5. Isolated hourglass deformity of the penis without curvature
6. Treatment or plans to undergo treatment for PD, including but not limited to any previous surgery, oral/topical agents within 3 months, intralesional medical therapies within 3 months, extracorporeal shock wave therapy within 6 months, or use of mechanical devices within 2 weeks before the start of the study