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Skin cancer develops when skin cells grow abnormally, often due to ultraviolet (UV) radiation. The three main types are basal cell carcinoma, squamous cell carcinoma, and melanoma. Each presents with distinct symptoms, ranging from pearly bumps to changing moles, and early detection by a dermatologist helps improve treatment outcomes. Here is more information on what skin cancer is, what causes it, the main types, and the symptoms associated with each:
What Is Skin Cancer?
Skin cancer is the uncontrolled growth of abnormal skin cells. It develops when damaged cells multiply rapidly, forming malignant tumors. These abnormal cells most often appear on areas of skin exposed to sunlight, though they can develop anywhere on the body.
The condition is classified by the type of cell where the cancer originates. Some forms grow slowly and remain localized, while others can spread to other tissues and organs. Understanding the cellular origin helps dermatologists determine the diagnosis, which guides the treatment approach.
What Causes It?
The primary cause of this cancer is exposure to ultraviolet radiation from the sun or artificial sources such as tanning beds. UV radiation damages the DNA inside skin cells, which can trigger abnormal growth over time. Repeated or prolonged exposure increases the likelihood of cellular damage. Risk factors include:
- Fair skin, light hair, and light-colored eyes
- A history of sunburns or excessive sun exposure
- A weakened immune system
- A family or personal history of skin cancer
- The presence of numerous moles or atypical moles
What Are the Different Types?
Skin cancer falls into several categories, with three types accounting for the majority of diagnoses. Basal cell carcinoma is the most common form and originates from basal cells in the lower layer of the epidermis. Squamous cell carcinoma develops in the squamous cells that make up the outer layer of skin. Melanoma is the most serious type, and it begins in melanocytes, the cells responsible for producing pigment. Less common forms exist, such as Merkel cell carcinoma and cutaneous lymphoma. These rarer types require specialized evaluation and treatment.
What Are Their Symptoms?
Each type produces recognizable signs on the skin. Basal cell carcinoma often appears as a pearly or waxy bump, a flat flesh-colored lesion, or a sore that bleeds and does not heal. These growths typically develop on the face, neck, and other sun-exposed areas, affecting the patient’s appearance.
Squamous cell carcinoma usually presents as a firm red nodule or a flat lesion with a scaly, crusted surface, which a dermatologist can expertly identify. It may feel tender, and it typically develops on the ears, lips, hands, and other exposed areas. The lesions sometimes appear within existing scars or chronic wounds.
Melanoma symptoms are often identified using the ABCDE method, which examines moles for asymmetry, irregular borders, varied color, a diameter larger than six millimeters, and evolving size or shape. A new growth or a change in an existing mole can signal melanoma. Monitoring the skin for these changes enables earlier detection; this supports less invasive treatment options.
Schedule a Dermatology Appointment
Skin cancer takes several forms, each with distinct causes and symptoms, but all share one common factor: early detection helps improve outcomes. Basal cell carcinoma, squamous cell carcinoma, and melanoma each carry recognizable warning signs that you can monitor at home. Regular self-examinations paired with professional evaluations create a reliable approach to skin health. If you have a suspicious growth, schedule an appointment with a dermatologist today to protect your skin and long-term well-being.
