Skin Lesion Excision in Danville, CA
Cutting Out Skin Lesions in Danville, CA
Surgical excision removes a skin lesion through the full thickness of the skin, usually with a planned margin and closure. Dermatologists use excision for selected benign growths, atypical moles, cysts and certain skin cancers when complete removal and/or pathology are important. The exact margin, closure and need for referral depend on the diagnosis, so a “simple excision” should never be planned without first knowing what is being removed.
An excision means cutting something out through the full thickness of the skin, usually with a planned border of normal skin around it, and then closing the wound. Skin doctors use it for certain harmless growths, for unusual moles, for cysts, and for some skin cancers, when the whole thing needs to come out, or when it needs testing. How wide the border is, how the wound is closed, and whether you need referring elsewhere, all depend on what it actually is. So a simple excision should never be planned before anyone knows what is being removed.
Excisions: the essentials
The short version
Removing a lesion through the full thickness of skin, often with a margin, followed by wound closure or another healing method.
Cutting something out through the full thickness of skin, usually with a border of normal skin, then closing the wound.
Diagnosis, complete removal, cancer treatment, recurrent lesions or symptomatic benign growths.
To find out what something is, to remove it completely, to treat a cancer, to deal with something that has come back, or to get rid of a harmless growth that is causing trouble.
Many office excisions use local anesthesia while the patient remains awake.
Most of these are done here with the area numbed, while you stay awake.
Excised tissue is commonly sent for microscopic examination when diagnosis or margins matter.
What is removed is usually sent to a laboratory, when the diagnosis or the edges matter.
May involve stitches, layered closure, natural healing, flap or graft depending on the wound and setting.
Usually stitches, sometimes in layers. Some wounds are left to heal on their own, and some need skin moved or grafted.
A full-thickness excision creates a scar; scar length is often longer than the visible lesion so the wound can close safely.
Cutting through the full thickness always leaves a scar, and the line is usually longer than the lump was, so the wound can close neatly.
What is a skin excision?
What is an excision?
An excision is a planned surgical removal of a lesion and a surrounding amount of skin selected for that diagnosis. Unlike superficial destruction, it produces tissue that can be examined and allows the surgeon to assess whether the lesion reaches the specimen edges.
It is a planned operation to remove a lesion, plus an amount of skin around it chosen for that particular diagnosis. Unlike burning or freezing something off, it gives us actual tissue to examine, and lets the surgeon see whether the lesion reaches the edges of what was taken.
- The visible lesion is not always the same size as the surgical wound.
- For cancer, the purpose is not cosmetic removal: it is complete treatment with appropriate margins.
- For benign lesions, the benefit of complete removal must be balanced against the scar.
- The wound is often bigger than the thing you could see.
- For a cancer, the point is not tidy removal. It is complete treatment, with the right border of normal skin.
- For something harmless, the benefit of getting rid of it has to be weighed against the scar.
What kinds of skin problems can be excised?
What can be removed this way?
Excision can be useful for several different diagnoses, but each has a different goal and margin. The pathology or clinical diagnosis determines the plan.
Many different things, but each has a different goal and a different border. What it is, or what the earlier test showed, decides the plan.
| Suspicious / atypical mole | Obtain full-thickness tissue and/or remove a lesion after biopsy | Melanoma-specific planning depends on pathology |
|---|---|---|
| Selected basal or squamous cell carcinoma | Remove cancer with an appropriate clinical margin | High-risk sites/tumors may be better suited to Mohs surgery or referral |
| Cyst or other benign subcutaneous lesion | Remove the wall/capsule to reduce recurrence when appropriate | Active infection can change timing and technique |
| Symptomatic benign growth | Relieve repeated trauma, irritation or discomfort | Cosmetic benefit must be weighed against the surgical scar |
| Recurrent lesion | Remove deeper residual tissue and obtain diagnosis | Recurrence can signal incomplete removal or an incorrect original diagnosis |
A suspicious or unusual mole To get full thickness tissue, or to remove it properly after an earlier sample. If it is a melanoma, the plan depends on what the laboratory found.
Certain basal cell or squamous cell cancers To remove the cancer with an appropriate border. High-risk ones, and those in awkward places, may be better suited to Mohs surgery, or to a referral.
A cyst or another lump under the skin To take out the whole sac, so it is less likely to come back. An infection now can change the timing and the technique.
A harmless growth that keeps causing trouble To stop it being knocked, rubbed or irritated. The benefit has to be weighed against the scar.
Something that has come back To remove what was left behind and get a diagnosis. Something returning can mean it was not fully removed, or that the first diagnosis was wrong.
Illustration showing marking, excision, specimen and skin closure
A drawing showing the marking, the cut, the piece removed, and the wound being closed.
What should I tell the dermatologist before an excision?
What should I tell the doctor beforehand?
A safe plan requires the diagnosis, medication list, bleeding history, allergies and healing history. Do not stop prescription blood thinners on your own; the clinician will advise how to manage medications for the specific procedure.
For a safe plan we need to know the diagnosis, everything you take, whether you bleed easily, your allergies, and how you heal. Never stop a prescribed blood thinner yourself. The clinician will tell you how to handle your medicines for this particular procedure.
- Bring prior biopsy/pathology reports if the lesion was sampled elsewhere.
- Tell the clinician about pacemakers/implanted devices, immunosuppression, diabetes and prior wound infections.
- Mention nicotine use because it can impair wound healing.
- Ask whether you will need someone to assist with wound care or activity restrictions.
- Bring any earlier laboratory reports if the lesion was sampled somewhere else.
- Tell us about pacemakers or other implanted devices, about a suppressed immune system, about diabetes, and about any wound infections you have had before.
- Mention if you smoke or vape, because nicotine slows wound healing.
- Ask whether you will need help with the dressings, or need to avoid certain activities.
Diagram showing skin lesion excision, pathology review and next steps based on margins
A diagram showing the removal, the laboratory testing, and what happens next depending on the edges.
What happens during an excision?
What happens during it?
The treatment area is marked, cleaned and numbed. The lesion is removed with the planned amount of surrounding tissue, bleeding is controlled, and the wound is repaired in the manner best suited to its location. Tissue is sent to pathology when indicated.
The area is marked, cleaned and numbed. The lesion is removed, with the planned amount of skin around it. Any bleeding is stopped, and the wound is repaired in whatever way suits that part of the body. What was removed goes off for testing when that is needed.
| Planning | Confirm diagnosis, lesion site and intended margin/repair |
|---|---|
| Local anesthesia | Numbing injection; pressure and movement may still be felt |
| Removal | Lesion is excised through the needed depth |
| Closure | Often layered stitches; some wounds heal naturally or require another repair technique |
| Pathology | Specimen is examined when clinically indicated; margin status may affect next steps |
Planning Confirming what it is, where it is, and how wide a border and what kind of repair are needed.
Numbing An injection to numb the area. You may still feel pressure and movement, but not sharpness.
Removing it The lesion is cut out, to whatever depth is needed.
Closing it Usually stitches, often in layers. Some wounds heal naturally, and some need a different kind of repair.
Testing The piece is examined when that matters. What the edges show may change what happens next.
What is recovery after an excision?
What is the recovery like?
Most office excisions require simple but consistent wound care and temporary protection from stretching. The location matters: a small wound over the back, shoulder, knee or another high-tension site may need more activity restriction than a similar wound elsewhere.
Most of these need simple but consistent wound care, and protecting the wound from being stretched. Where it is matters a lot: a small wound on the back, a shoulder or a knee is under far more tension, and needs more restriction, than the same wound somewhere else.
- Keep the wound moist and covered as instructed rather than repeatedly letting it dry and scab.
- Firm pressure is usually the first step for minor postoperative bleeding; persistent bleeding needs medical advice.
- Stitches may be removed at different times depending on location, or absorb on their own.
- Final scar color and firmness evolve over months.
- Keep the wound moist and covered as instructed. Do not keep letting it dry out and scab over.
- For minor bleeding afterwards, firm pressure is the first thing to do. Bleeding that will not stop needs medical advice.
- Stitches come out at different times depending where they are, and some dissolve on their own.
- The final colour and firmness of the scar carry on changing for months.
What are the risks of skin excision?
What are the risks?
Excision is generally well tolerated when appropriately selected, but risks include bleeding, infection, wound separation, numbness, contour change, delayed healing and an unsatisfactory or raised scar. The exact risk depends on location, size and health factors.
It is generally well tolerated when it is the right choice. The risks are bleeding, infection, the wound opening, numbness, a dent or bulge in the contour, slow healing, and a scar you are not happy with. How likely those are depends on where it is, how big it is, and your health.
- Some sensory nerves can be bruised or cut, causing temporary or occasionally persistent numbness.
- Keloid-prone patients need a specific scar-risk discussion.
- A pathology result showing involved margins or a more serious diagnosis may require additional treatment.
- Small nerves can be bruised or cut, leaving an area numb for a while, and occasionally for good.
- If you form thick raised scars, that needs discussing specifically before you agree.
- If the laboratory finds the lesion reaches the edges, or finds something more serious, you may need further treatment.
Illustration of covered dermatologic surgery wound care
A drawing of a dressed wound after skin surgery.
When is standard excision not the best option?
When is this not the best option?
Standard excision is not ideal for every lesion. Certain high-risk basal/squamous cell carcinomas may benefit from Mohs surgery; melanoma may need melanoma-specific margins, sentinel-node discussion or oncology/surgical referral.
It is not right for everything. Some higher-risk basal cell and squamous cell cancers do better with Mohs surgery. A melanoma may need its own particular border, a discussion about testing a lymph gland, or a referral to a cancer surgeon or specialist.
- Tumor type, location, borders, recurrence history and pathology guide the choice.
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Referral is part of comprehensive dermatologic care; not every excision is performed here
- The type of tumour, where it is, how well defined its edges are, whether it has come back before, and what the laboratory said, all guide the choice.
- Referring you elsewhere is part of proper care. Not everything is done here.
Questions patients ask
Is an excision the same as a biopsy?
Is this the same as a biopsy?
An excisional biopsy can remove an entire lesion for diagnosis, but “excision” can also refer to definitive treatment after a prior diagnosis. The purpose and margin are different.
Not quite. Sometimes the whole lesion is removed in order to find out what it is, which is a kind of biopsy. Other times excision is the definitive treatment, after the diagnosis is already known. The purpose, and the border taken, are different.
Will I be awake during the procedure?
Will I be awake?
Many dermatologic excisions are performed with local anesthesia, so the treatment area is numb while you remain awake.
Usually yes. Most of these are done with the area numbed, so you feel nothing sharp while staying awake.
Why is the scar longer than the growth?
Why is the scar longer than the lump was?
A fusiform/elliptical closure often needs extra length so the skin edges come together smoothly without puckering.
To close a round hole neatly, the surgeon cuts an oval, and that oval has to be longer than the lump so the two edges meet smoothly without bunching up at the ends.
Does clear pathology mean I will never get another skin cancer?
If the edges were clear, am I safe from now on?
No. Clear margins apply to that treated lesion. People with one skin cancer may remain at increased risk for future skin cancers elsewhere.
Clear edges mean that particular lesion was fully removed. Anyone who has had one skin cancer is at higher risk of getting another one elsewhere, so keep checking.
How do I know if the wound is infected?
How do I know if it is infected?
Increasing pain, spreading redness, warmth, pus or fever can be warning signs. Contact the practice if the wound is worsening rather than gradually improving.
Pain getting worse, redness spreading, warmth, pus, or a fever. Ring us if the wound is getting worse rather than slowly better.
Can every skin cancer be treated with a standard excision?
Can every skin cancer be treated this way?
No. Treatment depends on cancer type and risk. Mohs surgery, melanoma-specific surgery or oncology referral may be more appropriate for selected cases.
No. It depends on the type and the risk. Mohs surgery, melanoma surgery, or a referral to a cancer specialist may be more appropriate.
If this is a medical emergency, call 911. For an urgent skin problem during office hours, call the practice on (925) 820-3376 rather than using a form, messages are not monitored continuously.
Talk it through with a physician first.
Every plan starts with an assessment of your skin, your anatomy and what you actually want to change.
This page is general health information, not medical advice. It cannot tell you whether a treatment is right for you. Approved uses, risks and results differ from person to person, and product labelling changes. Ask us at Dermatology and Laser Centre about your own situation, or make an appointment, and seek urgent care for any serious symptom.
