Quick Summary
- Basal cell carcinoma (BCC) and squamous cell carcinoma (SCC) are the two most common types of skin cancer, and both are strongly linked to cumulative sun exposure.
- BCC typically looks like a pearly or waxy bump, often with visible small blood vessels; it grows slowly and almost never spreads beyond the skin.
- SCC often looks like a firm, red, scaly patch or a wart-like growth; it tends to grow faster and carries a higher — though still low — risk of spreading.
- Both are highly treatable when caught early, most often with Mohs surgery on the face and other cosmetically or functionally sensitive areas.
- Appearance alone isn't a reliable way to tell them apart — a biopsy is the only way to know for certain which one (if either) you're dealing with.
Basal cell carcinoma and squamous cell carcinoma together account for the vast majority of all skin cancer diagnoses. Both arise from years of accumulated ultraviolet exposure, both are most common on sun-exposed skin, and both are usually curable when treated early — but they're different cancers with different growth patterns, different risk profiles, and slightly different reasons to take a new spot seriously.
What Basal Cell Carcinoma Looks Like
BCC most often shows up as a small, pearly or translucent bump, sometimes pink or flesh-colored, frequently with tiny blood vessels visible across its surface. It can also appear as a flat, scar-like patch or a sore that bleeds, crusts, and seems to heal before reopening — a pattern sometimes nicknamed a "rodent ulcer." BCC is most common on the face, especially the nose and ears, and it grows slowly, often over many months or years. It very rarely spreads to other parts of the body, but left untreated it can grow deeper and damage surrounding skin, cartilage, or bone.
What Squamous Cell Carcinoma Looks Like
SCC typically presents as a firm, red, scaly patch or a raised, wart-like growth that may become tender, crust over, or ulcerate. It sometimes develops from an actinic keratosis (a rough, sun-damaged patch) that was left untreated. SCC is common on the scalp, ears, lips, and the backs of the hands — areas that take a lifetime of sun exposure — and it tends to grow faster than BCC, over weeks to months rather than years. SCC carries a higher risk of spreading to nearby lymph nodes than BCC, particularly on the lip or ear or in patients with a weakened immune system, which is part of why prompt evaluation matters.
Key Differences at a Glance
| Feature | Basal Cell Carcinoma | Squamous Cell Carcinoma |
|---|---|---|
| Typical look | Pearly/waxy bump with visible small vessels | Firm, red, scaly patch or wart-like growth |
| Growth speed | Slow — months to years | Faster — weeks to months |
| Common locations | Face, especially nose and ears | Scalp, ears, lips, backs of hands |
| Spreads beyond skin? | Very rarely | Uncommon, but higher risk than BCC |
| Often arises from | New growth on sun-damaged skin | Can develop from an untreated actinic keratosis |
| Typical treatment | Mohs surgery, excision, or topical/destructive therapy for early cases | Mohs surgery or excision; occasionally radiation |
Why Getting This Right Matters
Both cancers are usually treated successfully, and Mohs surgery — which removes the cancer in thin layers while sparing as much healthy tissue as possible — is a common approach for both when they occur on the face or other cosmetically sensitive areas. The real reason the distinction matters is risk stratification: SCC's higher potential to spread means a new or changing growth that could be SCC deserves prompt evaluation rather than a wait-and-see approach, especially on the lips, ears, or in anyone who is immunosuppressed (including organ transplant recipients, who have a significantly elevated SCC risk).
Not sure if a spot needs a closer look?
Our board-certified dermatologists see patients at our Burien and Bellevue offices — same-week appointments are often available.
Schedule a Skin CheckWhen to See a Dermatologist
See a dermatologist for any spot that's new, changing, growing, bleeding, or not healing after a few weeks — especially on sun-exposed skin. A quick in-office exam, sometimes with a biopsy, is the only reliable way to confirm what a spot is and get the right treatment started before it grows any further.