What is Skin Cancer? Causes, Symptoms, Diagnosis, and Treatment Options

What is Skin Cancer?

Skin cancer occurs when abnormal cells in the skin begin to grow uncontrollably due to DNA damage, often caused by excessive exposure to ultraviolet (UV) radiation. It is one of the most common forms of cancer globally, affecting people of all skin tones and ages. Skin cancer can develop anywhere on the body, though it most often appears in sun-exposed areas such as the face, neck, arms, and legs.

This condition is significant because, while many skin cancers are highly treatable when detected early, delayed diagnosis can lead to complications and spread to other organs. As awareness grows, so does the importance of preventive measures like sun protection and regular skin checks.

THANC Hospital Chennai provides comprehensive dermatologic oncology care, integrating advanced diagnostic imaging, targeted therapies, and expert surgical interventions. With its multidisciplinary team of oncologists, dermatologists, and reconstructive surgeons, the hospital ensures each patient receives individualized, compassionate, and scientifically advanced treatment for all types of skin cancers.

Understanding Skin Cancer

Skin cancer arises when mutations occur in the DNA of skin cells, leading them to multiply abnormally and form malignant growths. The skin has three main layers—epidermis, dermis, and subcutaneous tissue—and cancer can originate in any of these, depending on the cell type involved.

Types of Skin Cancer

Skin cancer is broadly divided into two categories: non-melanoma and melanoma.

1. Basal Cell Carcinoma (BCC)
   
   • The most common type.
     
   • Originates from basal cells in the epidermis.
     
   • Grows slowly and rarely spreads but can damage nearby tissues if untreated.
     
2. Squamous Cell Carcinoma (SCC)
   
   • Develops from squamous cells near the surface of the skin.
     
   • More likely to invade deeper layers or metastasize than BCC.
     
3. Melanoma
   
   • Arises from pigment-producing cells called melanocytes.
     
   • Though less common, it is the most aggressive and life-threatening form.
     
4. Other Rare Types
   
   • Merkel cell carcinoma: Fast-growing neuroendocrine cancer.
     
   • Cutaneous lymphoma: Affects lymphocytes in the skin.
     
   • Kaposi’s sarcoma: Often linked to weakened immunity or viral infections.
     

Causes of Skin Cancer

The primary cause of skin cancer is prolonged exposure to ultraviolet (UV) radiation, from either the sun or artificial sources like tanning beds. However, several other factors contribute to its development:

• Genetic mutations or family history of skin cancer
  
• Fair skin tone or light hair and eye color
  
• Repeated sunburns, especially in childhood
  
• Chronic skin inflammation or scarring
  
• Exposure to chemicals like arsenic or tar
  
• Compromised immune system (e.g., due to organ transplant or HIV)
  
• Age-related skin changes and long-term outdoor exposure
  

Risk Factors

Certain factors elevate the risk of developing skin cancer:

• UV radiation: The leading cause of skin cell DNA damage.
  
• Skin type: Fair-skinned individuals have less melanin and higher risk.
  
• Geographic location: Living in tropical or high-altitude areas increases sun exposure.
  
• Personal or family history: Previous cancer increases recurrence risk.
  
• Weakened immunity: Long-term immunosuppressive drug use.
  
• Moles: Large or irregularly shaped moles may turn cancerous.
  
• Gender: Men have slightly higher incidence rates due to outdoor exposure.
  

Who is Affected

Skin cancer affects both men and women across all age groups. While older adults are at greater risk due to cumulative sun exposure, melanoma is increasingly being diagnosed in younger individuals who spend extended time outdoors without adequate protection.

Common Symptoms of Skin Cancer

Skin cancer often starts subtly, making early recognition essential for effective treatment. Symptoms can vary depending on the type and stage of the cancer.

Key Symptoms

• A new growth or sore that doesn’t heal within a few weeks
  
• A change in size, shape, or color of an existing mole
  
• A dark or irregular patch on the skin that spreads gradually
  
• Itching, tenderness, or bleeding from a skin lesion
  
• A waxy, pearly bump (typical of basal cell carcinoma)
  
• A rough, scaly, or crusted lesion (suggestive of squamous cell carcinoma)
  
• A dark, irregular mole with uneven borders and multiple shades (sign of melanoma)
  
• Satellite lesions or smaller spots appearing around a mole
  

When to Seek Medical Help

Consult a dermatologist or oncologist immediately if you observe:

• A mole changing rapidly in appearance
  
• Persistent sores or lesions that bleed easily
  
• Painful or inflamed patches on the skin
  
• Newly developed spots that appear different from others
  
• Unexplained changes in skin texture or color
  

Early detection is critical—skin cancer caught in its initial stages can often be completely cured with minimal intervention.

Diagnosis of Skin Cancer

Accurate diagnosis begins with a detailed clinical examination followed by confirmatory laboratory and imaging tests. Identifying the type and stage of skin cancer guides the most effective treatment plan.

Diagnostic Tests and Procedures

1. Physical Examination
   
   • The dermatologist examines the skin, noting suspicious lesions and their characteristics—size, color, shape, and texture.
     
2. Dermatoscopy (or Dermoscopy)
   
   • A magnified view using polarized light to detect subtle patterns invisible to the naked eye.
     
3. Skin Biopsy
   
   • The gold standard for diagnosis.
     
   • Types include:
     
     • Shave biopsy: Removes surface layers.
       
     • Punch biopsy: Extracts a deeper skin sample.
       
     • Excisional biopsy: Removes the entire lesion for analysis.
       
4. Histopathological Examination
   
   • Confirms malignancy and determines cancer type, depth, and margins.
     
5. Imaging Studies (for advanced cases)
   
   • CT or MRI scans assess spread to lymph nodes or internal organs.
     
   • PET scans detect metastatic activity.
     
6. Sentinel Lymph Node Biopsy
   
   • Used in melanoma cases to check for cancer spread beyond the primary site.
     

THANC Hospital Chennai utilizes cutting-edge imaging systems and high-precision diagnostic tools to identify skin cancer at the earliest possible stage. A collaborative team reviews every case to ensure accurate diagnosis and personalized treatment recommendations.

Treatment Options for Skin Cancer

The approach to treating skin cancer depends on the tumor type, size, depth, and whether it has metastasized. The primary goal is to remove cancerous tissue while preserving cosmetic appearance and skin function.

Non-Surgical / Medical Treatments

1. Topical Medications
   
   • Used for superficial basal or squamous cell carcinomas.
     
   • Include imiquimod (boosts immune response) and 5-fluorouracil (destroys cancer cells).
     
2. Cryotherapy (Cryosurgery)
   
   • Involves freezing abnormal tissue with liquid nitrogen, causing it to fall off naturally.
     
3. Photodynamic Therapy (PDT)
   
   • Combines photosensitizing agents and light exposure to destroy cancerous cells.
     
   • Effective for early-stage or surface lesions.
     
4. Radiation Therapy
   
   • High-energy rays target tumors, especially when surgery is not possible.
     
   • Helps control recurrence in advanced or inoperable cases.
     
5. Chemotherapy
   
   • Used for advanced cancers that have spread to distant organs.
     
   • Administered topically, orally, or intravenously.
     
6. Targeted Therapy
   
   • Focuses on specific genetic mutations found in melanoma (e.g., BRAF or MEK inhibitors).
     
   • Minimizes damage to healthy cells and enhances treatment precision.
     
7. Immunotherapy
   
   • Stimulates the immune system to identify and destroy cancer cells.
     
   • Drugs such as nivolumab and pembrolizumab have shown success in metastatic melanoma.
     
8. Pain Management and Supportive Care
   
   • Addresses discomfort, itching, or scarring, improving the patient’s quality of life.
     

Surgical / Advanced Treatments

1. Excisional Surgery
   
   • The most common procedure for removing cancerous lesions with a safety margin of healthy tissue.
     
2. Mohs Micrographic Surgery
   
   • A tissue-sparing technique used for high-risk or cosmetically sensitive areas (e.g., face).
     
   • Ensures complete removal while preserving healthy skin.
     
3. Curettage and Electrodessication
   
   • Involves scraping away tumor tissue followed by cauterization.
     
4. Lymph Node Dissection
   
   • Performed if the cancer has spread to nearby lymph nodes.
     
5. Reconstructive Surgery
   
   • Restores the appearance and functionality of skin after large excisions.
     
6. Laser Therapy
   
   • Used selectively for early or superficial cancers to minimize scarring.

Prevention & Lifestyle Tips

Though not all skin cancers can be prevented, adopting protective habits and lifestyle changes can significantly lower the risk.

Practical Steps for Preventing Skin Cancer

• Avoid prolonged sun exposure, especially between 10 a.m. and 4 p.m.
  
• Apply broad-spectrum sunscreen (SPF 30 or higher) daily, even on cloudy days.
  
• Wear protective clothing, including hats and sunglasses.
  
• Avoid tanning beds and artificial UV exposure.
  
• Regularly examine your skin for new or changing lesions.
  
• Seek shade whenever possible during outdoor activities.
  
• Keep skin moisturized to maintain a healthy barrier function.
  
• Consume antioxidant-rich foods (berries, green vegetables, fish) to support skin health.
  

Healthy Lifestyle and Risk Reduction

• Stay hydrated and maintain a nutrient-rich diet for optimal skin regeneration.
  
• Quit smoking—it impairs healing and weakens skin defense.
  
• Manage stress, as it affects immune strength.
  
• Schedule annual skin screenings, especially if you have a history of sunburns or skin lesions.
  

Preventing skin cancer starts with awareness and consistent sun protection habits.

Why Choose THANC Hospital for Skin Cancer Treatment?

THANC Hospital Chennai is a leading destination for comprehensive skin cancer diagnosis, treatment, and follow-up care. The hospital’s oncology and dermatology teams collaborate to deliver accurate diagnosis, advanced interventions, and holistic patient care.

Highlights of Skin Cancer Care

• Expert Multidisciplinary Team: Dermatologic oncologists, surgeons, and reconstructive specialists collaborate on each case.
  
• Advanced Diagnostic Capabilities: Equipped with high-resolution imaging, dermatoscopy, and histopathology laboratories.
  
• Minimally Invasive Procedures: Techniques like Mohs surgery and laser therapy ensure precision and minimal scarring.
  
• Customized Treatment Plans: Tailored to tumor type, stage, and patient goals.
  
• Reconstructive and Cosmetic Support: Restores natural appearance post-treatment.
  
• Integrated Patient Support: Counseling, nutritional guidance, and rehabilitation for overall recovery.
  
• Evidence-Based Care: Follows global best practices and the latest oncology research for superior outcomes.
  

Patients receive not just medical care but also the reassurance of compassion, safety, and long-term follow-up at every stage.

Frequently Asked Questions (FAQs)

1. Is skin cancer curable?

Yes, most forms of skin cancer are curable when detected early. Basal and squamous cell carcinomas respond well to surgical removal, while early-stage melanomas also have excellent survival rates with prompt treatment.

2. What is the best treatment for skin cancer?

Treatment varies by cancer type and stage. Surgery remains the most effective, but other options like immunotherapy, radiation, and topical medications are also highly successful depending on individual cases.

3. Can lifestyle changes help manage skin cancer?

A balanced diet, proper hydration, and strict sun protection can help manage recovery and prevent recurrence. Avoiding tobacco and stress also supports healing.

4. How do I know if I need to see a doctor for skin cancer?

If you notice any new growth, sore, or mole that changes shape, color, or bleeds, schedule a consultation immediately. Early examination can save lives.

5. Are all moles cancerous?

No. Most moles are benign, but any mole that changes rapidly or looks irregular should be evaluated by a dermatologist.

6. Can skin cancer spread to other organs?

Yes, advanced melanoma and squamous cell carcinoma can metastasize to lymph nodes or internal organs if untreated.

7. How often should I have a skin check?

Once a year is recommended for most individuals. Those with previous skin cancer or high UV exposure may require more frequent exams.