Skin Cancer and Dermatologic Surgery: From Warning Sign to Biopsy and Treatment
With skin tumours the goal is not to guess a diagnosis from a photo, but to know when a lesion needs an in-person examination, when dermoscopy adds important information, and when a biopsy and histology become necessary. This guide brings together warning signs, actinic keratosis, suspicious moles, and basal and squamous cell carcinoma in one path that starts with diagnosis and then moves to treatment.
Start here
Skin Cancer Warning Signs: The ABCDE Rule and When to Get Checked — ABCDE is a warning tool, not a home test that rules cancer out. This guide combines change, the ugly-duckling sign, bleeding and non-healing lesions with the appropriate next step.
Before you choose a treatment
A photo alerts, it does not decide
ABCDE, change, bleeding and a sore that does not heal help you know when to ask for an examination, but they neither confirm nor rule out cancer. When there is suspicion, clinical examination comes first, and a biopsy with histology may be needed.
Diagnosis before removal
A suspicious lesion should not be treated as a cosmetic procedure first. The type of biopsy or excision depends on the lesion's appearance, site and the diagnostic question, and the histology result guides the next step.
Risk factors change the plan
The number and site of lesions, sun damage, immunity, personal and family history and tumour type all change follow-up and treatment. That is why no single treatment map fits every spot or every skin cancer.
Skin cancer & dermatologic surgery guides
Moles and warning signs
- Skin Cancer Warning Signs: The ABCDE Rule and When to Get Checked — ABCDE is a warning tool, not a home test that rules cancer out. This guide combines change, the ugly-duckling sign, bleeding and non-healing lesions with the appropriate next step.
- Mole Checks and Biopsy: When to Worry and What the Result Means — Most moles are harmless. When does a mole need checking? What are the ABCDEs? How is a biopsy done and how long does it take, how do you care for the wound, and what does the lab report tell you?
Diagnosis and treatment
- Actinic Keratosis: Why We Treat It and How — Actinic keratosis reflects chronic UV damage and can progress to squamous cell carcinoma. This guide organizes diagnosis, lesion-directed therapy and field treatment.
- Basal vs Squamous Cell Carcinoma: How They Differ and What Comes Next — BCC and SCC are among the most common skin cancers, but their behavior and risk are not identical. This guide explains warning signs, biopsy and why site and risk features determine treatment.
Medical review
The content and connected guides on this page are written and medically reviewed by Dr. Yousef Abo Zarad, a German board-certified dermatologist and venereologist. Medical references are listed inside the detailed guides.
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