Mohs Clinic

Located on Johnson 3

If this is your first visit please go directly to Level 3.

Enter at the main entrance on Brock Street and take one of the main elevators up to level 3. Turn right off the elevator and  proceed down hallway.  At the Bariatric registration desk turn right and follow hallway down to the Mohs Clinic waiting room (almost to the end of the hallway). Printable map below.

If this is your second or more visit please go to Brock 1 Clinic to register.

Enter main entrance on Brock Street. Walk towards main elevators and then continue down hallway to your right (do not get on the elevator). Watch for “Brock One Clinic” sign hanging from ceiling. Turn at the first entrance on your right half way down that hallway to reach Registration Desk. Printable map below.

What is Mohs Surgery?

Mohs surgery is used to remove non-melanoma skin cancers from sensitive areas (e.g., head, face, neck).  It uses real-time confirmation of complete circumferential surgical margins (deep and peripheral) to remove the minimum amount of normal tissue required to ensure disease-free surgical margins. Performed under local anesthetic as an outpatient procedure, Mohs surgery is the gold-standard treatment for high-risk (either by subtype or location) basal and squamous cell carcinomas, offering cure rates of 99% and 97% respectively.

The Mohs microsurgery clinic at Hotel Dieu Hospital is one of only ten in Canada.  The clinic team includes a dermatologist, two medical lab technicians, registered practical nurse, program manager and clerical staff.  The clinic features three procedure rooms, a dedicated laboratory and patient waiting area.

Mohs Clinic Referral Form

Our laboratories received accredited status in 2013. Our next on-site accreditation is scheduled for January 2017. Our laboratory license is issued by the Ministry of Health and Long Term Care.


Phone: 613-544-3310, ext. 3415
Fax: 613-545-2202

Frequently Asked Questions

What are the advantages of Mohs surgery?

Mohs surgery allows surgeons to verify that all cancer cells have been removed at the time of surgery (by frozen section analysis), increasing the chance of a cure and reducing the need for additional treatments or surgery.  In addition, by carefully mapping out the tumor during the Mohs procedure, the surgeon removes cancerous tissue and leaves as much normal skin as possible.  The cure rate for Mohs surgery approaches 99 per cent for most primary (untreated) cancers with a slightly lower cure rate for secondary or recurrent (previously treated) cancers.

How does the Mohs procedure work?

A Mohs surgery begins in the morning with the area around the patient’s skin cancer being frozen using local anesthetic. Skin and tissue around the visible portion of the cancer are then removed with a scalpel and brought to the adjacent lab for frozen sectioning. During this time, a bandage is applied to the surgical site and the patient remains in the clinic. If the slides show that cancer still exists at the margins of the specimen, then the patient returns to the procedure room where any area of remaining cancer is cut out exactly as before. The process is repeated until the last tissue sample removed by the surgeon is cancer-free.  In most cases, the area under investigation is reconstructed and the patient returns home the same day.

Can family physicians refer a patient for Mohs surgery?

Family physicians can refer patients with biopsy-proven non-melanoma skin cancer.  Please include pathology results with all referrals. To refer a patient, please use the referral form posted in the “Healthcare Professionals” menu at Referrals can be faxed to 613-545-2202. Patients may also be referred by a dermatologist, plastic surgeon or other specialist.

What are the criteria for referral?

Biopsy-proven non-melanoma skin cancers that are ill-defined, have high-risk features such as infiltrating or micronodular subtype, are recurrent or are in cosmetically or functionally-sensitive areas are suitable for treatment with Mohs surgery.

Who can I contact for further information?

If you have questions about the Mohs micrographic surgery procedure or clinic, please contact:

Dermatology Department
Hotel Dieu Hospital
166 Brock Street
Kingston, ON K7L 5G2
Phone: 613-544-3310, ext. 3415
Fax: 613-545-2202