Introduction:
Mohs Micrographic Surgery
is a specialized procedure for the removal of skin cancer. The procedure
is named after the originator of the technique, Dr. Frederick Mohs.
This information packet was written to help you understand what
Mohs Micrographic Surgery is, and why it is recommended for the
treatment of skin cancer.
Rhett Drugge, M.D., is board certified as a dermatologist
by the American Board of Dermatology and Dermatologic Surgery and
is a fellow of the American Society for Mohs Surgery.
Dr. Drugge is one of a very small number of specially
trained dermatologists who performs Mohs Micrographic Surgery in
this region. This highly successful surgery is offered in an outpatient
setting at the dermatology office of Dr. Charles Sheard and Dr.
Rhett Drugge on 50 Glenbrook Road in Stamford, Connecticut. Patients
who undergo Mohs Micrographic Surgery do so in relative comfort
and do not require a hospital visit.
Dr. Drugge encourages patients to be as informed as
possible about the surgical procedure they are considering. He and
his staff are available to answer any questions you might have.
What is skin cancer?
Skin cancer, by far the most common malignant tumor
in humans, is an abnormal growth of cells that expands in an unpredictable
pattern on the skin. The most common types of skin cancer are basal
cell carcinoma, squamous cell carcinoma, and malignant melanoma-
each named for the particular skin cell from which it arises. Basal
cell carcinomas and squamous cell carcinomas are commonly treated
by Mohs Micrographic Surgery in our office. Other types of skin
cancer can also be treated with Mohs Micrographic Surgery.
Both basal cell carcinoma and squamous cell carcinoma
begin as a single point in the upper layers of the skin and slowly
enlarge, spreading both along the surface and downward. These extensions
cannot always be directly seen. The tumor often extends far beneath
the surface of the skin. If not completely removed, both types of
skin cancer may invade and destroy structures in their path.
Although these skin cancers are locally destructive,
they do not metastasize (spread) to distant parts of the body. Metastasis
is extremely rare in basal cell carcinoma and usually occurs only
with long-standing, large tumors. Squamous cell carcinoma is slightly
more dangerous and patients must be observed for any spread of the
tumor, although it is unlikely. Certain types of melanoma are treated
by Mohs Micrographic Surgery in our facility.
What causes skin cancer?
Excessive exposure to sunlight is the single
most important factor associated with the development of skin cancers.
In addition, the tendency to develop these cancers appears hereditary
in certain ethnic groups, especially those with fair complexions
and poor tanning abilities. Fair-skinned people develop skin cancers
more frequently than dark-skinned people and the more sun exposure
they receive, the more likely they are to develop a skin cancer.
Other factors, including exposure to certain chemicals, may also
be involved in the development of skin cancers. But the highest
incidence of skin cancer is found in cities such as Dallas and Miami
where the sun is very intense.
How is skin cancer treated?
There are several methods for treating skin
cancers, including excision (surgical removal), curettage and electrodesiccation
(scraping and burning), X-ray therapy, cryosurgery (freezing), topical
chemotherapy and Mohs Micrographic Surgery. The method chosen depends
on the location of the cancer, its size, type, and previous treatment.
Your doctor will base his recommendations on these factors.
What is Mohs Micrographic Surgery?
Approximately 40 years ago, Dr. Frederick Mohs of
Madison, Wisconsin developed a unique treatment of skin cancer called
chemosurgery. Dr. Mohs applied a caustic chemical to "fix"
(harden) the area involving the area involving the tumor, so that
it could be removed and traced to all of its edges. Since then,
the procedure has been refined. Today, almost all cases are treated
by the "fresh tissue" technique which omits the use of
this caustic chemical and allows dermatologists to remove all of
the tumor layers in one day. Mohs Micrographic Surgery is a technique
that enables dermatologists to selectively remove areas involved
with the skin cancer, while at the same time preserving the greatest
amount of normal tissue as is possible. If surgical repair of the
defect is necessary, it can be done with the knowledge that there
is no residual tumor left. As a result, Mohs Micrographic Surgery
is very, very useful for large tumors, tumors with indistinct borders,
tumors near vital functional or cosmetic structures and tumors for
which other forms of therapy have failed.
What will happen at my preoperative visit?
Your first visit allows the doctor an opportunity
to examine your skin cancer, obtain your medical history and determine
whether the technique of Mohs Micrographic Surgery is the most appropriate
treatment. It also gives you a chance to meet Dr. Drugge and his
staff and learn about the procedure. If you have been referred to
the office, we will usually have received a pathology report stating
the type of skin cancer you have. If this information has not been
obtained, we will perform a biopsy during your preoperative visit.
This biopsy is important because it will tell us what type of cancer
you have - a critical factor in planning your treatment. The date
and time of your surgery will also be scheduled at this consultation.
How should I prepare for surgery?
Eat your usual breakfast. If you normally skip breakfast,
please have a morning snack on the day of surgery.
Take all of your regular medications unless directed
otherwise by your surgeon or your regular physician. If you take
any medicine containing aspirin, salicylates, other pain medicine,
anti-inflammatory medicine or arthritis medicine, please discuss
this with Dr. Drugge.
Wear comfortable, loose-fitting clothing that you
can easily get into and out of. Avoid any pull-over clothing. If
necessary, we may give you a hospital gown to wear during your surgery.
You may also want to bring a sweater in case the clinic room is
air-conditioned.
Please leave your whole day available for surgery.
That will allow enough time for you to rest and recover from the
procedure. On the day of your surgery, we encourage you to bring
a close friend or relative with you who can help you drive home
and keep you company between each stage of the procedure.
If you are very anxious or nervous, we can give you
a mild sedative prior to surgery. This must be arranged prior to
the day of surgery. If you take a sedative, you must be accompanied
by a close friend or relative who can take you home after your surgery.
How is surgery performed?
Mohs Micrographic Surgery is performed in a procedure
room under sterile conditions, with local anesthesia. Once anesthesia
is complete, the visible portion of the tumor is removed by excision
or scraping with a sharp instrument called a curette. Following
the removal of most of the tumor, a thin layer, encompassing the
complete undersurface of the tumor, is excised. That layer is then
cut into small pieces and a map is drawn to identify the location
of each piece. The edges of each piece are marked with dyes to aid
in orientation on our map. Each piece is then frozen and these slices
cut, stained, and examined under the microscope. Any areas in which
the tumor is found are marked on the map. Regions with remaining
tumor tissue are then reexcised. This procedure is repeated until
no more tumor is found and the cancer is entirely removed. After
each layer of tissue is obtained, oozing or bleeding vessels are
cauterized or ligated with a suture. A pressure dressing is applied.
You may then rest in a specially equipped waiting area with your
family member or friend.
How long does it take?
It takes 30 minutes to remove each layer of tissue,
and one or two hours to process and examine it. Most tumors require
the removal of three layers. Extensive tumors may need more surgery
and may require a second visit.
Will Mohs Micrographic Surgery cure me?
If you have a basal cell carcinoma, there is about
a 99 percent chance that you will be cured. If you have a squamous
cell skin cancer, you can be about 95 percent certain that you will
be cured by Mohs Micrographic Surgery. However, follow-up visits
to detect the rare recurrence are very important. After the initial
postoperative period, you will return to your referring physician
for routine skin care and tumor surveillance. The Mohs surgeon will
see you about once each year for five years to rule out the possibility
of recurrence.
When will my post-surgical plan be developed?
Since it is not possible to know the exact size of
each skin cancer until it has been completely removed, we cannot
determine your post-surgical treatment entirely in advance, although
we can tell you what to expect. Many wounds are superficial and
can heal on their own with excellent cosmetic results. If a surgical
wound requires surgical reconstruction, we will discuss it with
you following the complete removal of the cancer. Appropriate recommendations
and referrals will be made at that time.
What can I expect after the surgery?
You surgical wound will likely require special care
during the week(s) following surgery. You will have some swelling
and redness around the wound. This will gradually disappear over
seven to ten days. In larger wounds, some drainage may occur and
may have a foul odor for a few days. You should plan on wearing
a dressing and avoid strenuous physical activity for one to two
weeks.
You may experience a sensation of tightness across
the area of surgery. Skin cancers frequently involve nerves, and
months may pass before your skin sensation returns to normal. In
some cases, numbness may be permanent. You may also experience itching
after your wound has healed. Complete healing of the surgical scar
takes place over 12 to 18 months. Especially during the first few
months, the site may feel swollen or lumpy and there may be some
redness. Gently massage the area (starting about one month after
surgery) and keep the area lubricated with lotion to speed
the healing process.
Bleeding
Bleeding is rare. If it occurs, have someone apply
firm pressure to the site. If a bulky dressing has been placed on
the wound, this should not be removed. Direct pressure should be
applied to the padded wound for 15 minutes, timed by watching a
clock. Do not discontinue pressure to see if the bleeding has stopped
until 15 minutes have elapsed. If the bleeding continues, continue
to press directly with an additional clean gauze pad over the bleeding
site for another 15 minutes. If bleeding continues, call our office
or go to your local emergency room.
Pain
Mild to moderate pain is normal for a day or
two following surgery, but it generally responds well to oral pain
medications such as Tylenol or Tylenol #3. Do
not use aspirin or anti-arthritis pain medications such as Motrin
or Advil (ibuprofen) because they can cause bleeding.
If regular pain medications provide insufficient relief, or if the
pain increases after 3 to 4 days, you should contact our office.
How will my wound heal?
The human body healed itself naturally for thousands
of years before the advent of modern medicine, and it has great
recuperative ability. After the complete removal of the tumor, several
options may be considered for managing the wound.
Healing by spontaneous granulation
Letting the wound heal by itself offers a good chance
to observe the healing process and decreases the chance of a recurrent
cancer being invisible or hidden. If at any time during the course
of healing, the scar is deemed to be unacceptable, a cosmetic surgical
procedure can be performed. Allowing wounds to heal this way is
relatively painless and offers excellent cosmetic results for many
body locations.
Closing the wound or part of the wound
with stitches
This procedure often speeds healing and can offer
good cosmetic results, especially when the scar can be hidden in
a line of facial expression or wrinkling. Sutures generally remain
in place for 5 to 7 days, and occasionally up to two weeks, depending
on the location. Do not bathe the area for the first 72 hours. On
the fourth day following surgery, you may shower, but you must avoid
bathtubs and swimming pools for 5 to 7 days.
Closing the wound with skin grafts, flap repairs
or other reconstructive procedures
Recommendations or referrals for these procedures
will be made after complete removal of the tumor. We will make recommendations
that best serve each patient's needs.
How should I care for my wound?
You can act as your own nurse and will be impressed
at the excellent job you can do. To facilitate the healing of your wound,
you must change the dressing daily. With proper care you will be
surprised and please at how well and rapidly your wound heals. The
following materials may be required, but should not be purchased
before you receive your postoperative instructions.
- A bottle of peroxide for medicinal use (3%)
- Q-tips or cotton applicator sticks
- Non-stick dressing pads (Telfa)
- Hypoallergenic paper tape
- An antibiotic ointment such as Polysporin of Bacitracin
How do I change the dressing?
Keeping the dressing fresh and clean will facilitate
healing. Follow these steps:
- Remove the old dressing.
- Take a cotton-tipped applicator
and dip it into the hydrogen peroxide.
- Remove all crusting from the
normal skin. This may take some gentle, but persistent rubbing.
- Soak a cotton-tipped applicator
in hydrogen peroxide. Then clean the bottom of your wound if the
wound has been allowed to heal on its own, by gently rolling,
not rubbing, with the Q-tip. It may take 6 - 10 different applicator
sticks to adequately clean the area.
Note: Never place a used applicator stick back into the bottle
of hydrogen peroxide.
- Apply antibiotic generously to the wound.
- Cut the non-stick dressing to fit the exact size
of the base of the wound, then place it onto the base. If the
wound has been sutured, the non-stick dressing should cover the
ewn area completely.
- Cut a gauze pad to the size of the wound and place
it over the non-stick dressing.
- Use hypoallergenic tape to hold the dressing in
place.
- If the wound is near the eye, plain water
should be used for cleaning the wound since hydrogen peroxide may
cause irritation if it gets into the eye. If you have any problems
or further questions, please call our office.
- If you will require any modifications of this dressing
procedure, we will inform you and supply you with the materials
at the time of surgery.
Important reminders:
- Do advise us as soon as possible if you must cancel
or change your appointment.
- Do get a good night's sleep prior to surgery.
- Do take your usual medications on schedule, unless
otherwise directed by your doctor.
- Do take any new medications your Mohs surgeon prescribes
for you.
- Do eat breakfast.
- Do consider bringing someone with you or arrange
to have someone drive you home.
- Do ask any questions you might have.
- Do not consume alcohol for 24 hours prior to or
48 hours after surgery.
- Do not engage in strenuous physical activity for
24 hours prior to surgery. Discuss with your doctor when you may
resume strenuous activities.
What about...?
We want you to be as comfortable, relaxed and informed
about your Mohs Micrographic surgery as possible. Please contact
us if you have any questions.
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