In short. Skin cancer excision removes a basal cell or squamous cell carcinoma with a margin of healthy tissue, and reconstruction repairs the defect under the same plan. The tumour is removed first and the closure chosen afterwards, because the pathology report confirms whether the margins are clear.
Key points
- Surgery removes the tumour with a margin and rebuilds the defect in one plan.
- Basal cell carcinoma erodes locally; squamous cell carcinoma can spread to lymph nodes.
- The pathology report on margins is what confirms cure and guides further treatment.
- Direct closure, local flaps and grafts are chosen after the tumour is out.
- Excision cannot stop a new skin cancer developing elsewhere.
What the operation has to achieve
Basal cell carcinoma (BCC) and squamous cell carcinoma (SCC) are the most common skin cancers, and surgery is their most reliable cure. The operation has two jobs: remove the tumour completely with a margin of healthy tissue, and rebuild the resulting defect so that function and appearance are preserved as well as the removal allows. In a plastic surgery service, both jobs are planned together from the start.
Why the tumour type changes the plan
BCC grows slowly and almost never spreads, but it erodes locally and can cause serious damage on the nose, eyelid or ear if neglected. SCC grows faster and can spread to lymph nodes, especially when large, deep, or on the lip or ear. The pathology report after excision, which records tumour type, depth and whether margins are clear, is what confirms the cure and guides any further treatment.
Who is treated surgically, and who is not?
Surgical excision suits the great majority of BCCs and SCCs and is the standard for any tumour on the face, any SCC with risk features, and any recurrent lesion. Non-surgical options exist for selected low-risk superficial tumours in patients unfit for surgery, but they sacrifice the margin confirmation that pathology provides. Bleeding disorders, blood-thinning medication and healing problems are managed, not usually barriers.
Clear margins first, then the best closure
Small defects in loose skin close directly as a fine line. Where direct closure would distort an eyelid, lip or nostril, a local flap moves neighbouring skin of matching colour and thickness into the defect. Skin grafts suit shallow defects where flaps are not available. For high-risk or ill-defined facial tumours, staged excision with margin checking before reconstruction, the principle behind micrographic surgery, maximises cure while sparing tissue. The closure is chosen after the tumour, not before.
| Option | What it does | When it fits | Limits |
|---|---|---|---|
| Direct closure | Closes the defect as a fine line | Small defects in loose skin | Not where closure would distort a feature |
| Local flap | Moves neighbouring skin of matching colour and thickness into the defect | Where direct closure would distort an eyelid, lip or nostril | Leaves flap and donor scars |
| Skin graft | Covers the defect with skin taken elsewhere | Shallow defects where a flap is not available | Patch-like colour and texture match |
| Staged excision with margin checking | Removes the tumour, checks margins, then reconstructs | High-risk or ill-defined facial tumours | Delays closure by a few days |
| Non-surgical treatment | Destroys selected low-risk superficial tumours | Patients unfit for surgery | Sacrifices margin confirmation from pathology |
Operative details and anaesthesia
Most excisions are day procedures under local anaesthesia. The specimen is marked for orientation and sent for histopathology. Reconstruction proceeds immediately when margins are clinically clear, or is delayed a few days for margin confirmation in higher-risk cases. Larger reconstructions and node surgery use general anaesthesia in the main operating theatre.
What cure does not cover
Complete excision cures the overwhelming majority of BCCs and most SCCs. Surgery cannot guarantee that a new skin cancer will not develop elsewhere: patients who have had one are at higher risk of another, and every reconstruction leaves a permanent scar, however fine. Numbness around the scar is common and usually improves over months.
How is recovery and surveillance organised?
Sutures come out at five to fourteen days, and the scar matures over a year or more. Follow-up includes scar review, skin surveillance for new lesions, and lymph-node awareness for SCC patients. Sun protection becomes a permanent part of life, not a seasonal habit.
When should a lesion or a pathology report prompt urgent review?
A sore or patch that fails to heal for more than a month, bleeds easily, crusts repeatedly or grows steadily needs review. So does any new changing lesion in someone who has had a skin cancer before, or a lump in the neck or near the ear after SCC. A pathology report showing involved or close margins, or describing a high-risk tumour, means further treatment should not wait.
Sources
- American Academy of Dermatology: patient information on basal cell and squamous cell carcinoma
- American Society of Plastic Surgeons: patient information on skin cancer reconstruction
- Cochrane Library: systematic reviews on surgical excision margins for basal cell carcinoma
Source links open each organisation's search results for the topic. Document-level confirmation is pending the reviewer's sign-off.
Internal links
Frequently asked questions
Why is the tumour removed before the defect is closed?
Complete removal with a margin of healthy tissue is what cures most basal and squamous cell cancers, and the pathology report confirms it. Where margins are uncertain or the tumour is high risk, closure waits a few days for that confirmation rather than covering the wound immediately.
How is the defect closed after skin cancer excision?
Small defects in loose skin close directly as a fine line. Where that would distort an eyelid, lip, or nostril, a local flap brings in neighbouring skin of matching colour and thickness. Shallow defects that cannot take a flap are covered with a skin graft.
Does skin cancer surgery prevent new tumours appearing?
No. Excision cures the overwhelming majority of basal cell cancers and most squamous cell cancers, but it cannot stop a new lesion developing elsewhere on sun-exposed skin. Patients who have had one are at higher risk, which is why skin surveillance and sun protection continue.
Risks & Limitations
- Reconstruction is usually staged — more than one operation is normal, and the plan may change as healing progresses.
- Donor-site scarring and discomfort, including after rib cartilage harvest.
- Partial or complete failure of a flap or graft, which may require further surgery.
- Scars are permanent. They mature and fade but never disappear.
- Asymmetry and the inherent limits of matching a normal side.
- Altered sensation, numbness or weakness in the operated area.
- Contracture, which may need release procedures later.
- Final assessment is made at 6–12 months, and longer in growing children.
When to Seek Care
- A flap or graft that turns dark, cold, black or stops bleeding when pricked.
- Fever above 38 °C, or spreading redness, warmth or discharge around a wound.
- New or worsening pain, swelling or fluid leakage from the operative site.
- Bleeding that does not stop with gentle pressure.
- Any change in a reconstructed area that concerns you, however minor.
References & Further Reading
- American Society of Plastic Surgeons (ASPS) — reconstructive surgery guidance
- World Health Organization (WHO) — burn and trauma care resources
- Chinese Medical Association, Plastic Surgery Branch — clinical guidance
- Cochrane Library — systematic reviews in wound and reconstructive care
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.