Oral Cancer: Causes, Symptoms, Pathophysiology, Diagnosis & Nursing Care Plan

 🦷 Oral Cancer: Complete Guide for Nurses & Medical Students

🧾 Definition

Oral Cancer refers to the abnormal, uncontrolled growth of malignant cells in the tissues of the oral cavity, including the lips, tongue, cheeks, gums, floor of the mouth, roof of the mouth (palate), and oropharynx (back of the throat).

It is a subset of head and neck cancers and is most commonly of the squamous cell carcinoma type, which arises from the epithelial lining of the mouth.

Category	Examples
Tobacco Use	Cigarettes, cigars, pipe smoking, chewing tobacco
Alcohol Consumption	Especially when combined with tobacco use
HPV Infection	HPV-16 is strongly linked with oropharyngeal cancer
Sun Exposure	Chronic exposure increases lip cancer risk
Chronic Irritation	Ill-fitting dentures, sharp teeth
Dietary Deficiencies	Vitamin A, C, iron
Poor Oral Hygiene	Increased bacterial growth and chronic inflammation
Family History	Genetic predisposition in some cases

🔬 Step-by-Step Pathophysiology of Oral Cancer

1. Cellular Mutation

   • Exposure to carcinogens (e.g., tobacco, alcohol, HPV) causes DNA damage in oral epithelial cells.

2. Failure of DNA Repair Mechanisms

   • Damaged cells are not repaired or destroyed due to suppressed tumor suppressor genes (e.g., p53 mutation).

3. Uncontrolled Cellular Proliferation

   • Mutated cells multiply uncontrollably, leading to dysplasia and eventually carcinoma in situ.

4. Invasion into Surrounding Tissues

   • Malignant cells invade the basement membrane and adjacent tissues such as muscles, lymphatics, and nerves.

5. Angiogenesis & Metastasis

   • Tumor promotes formation of new blood vessels → cancer spreads to cervical lymph nodes and distant sites (lungs, liver, bones).

Symptom	Rationale
Non-healing mouth ulcer	Cancerous cells impair tissue healing
Lump or thickening in cheek	Mass of abnormal cells
Difficulty swallowing (dysphagia)	Invasion into pharyngeal tissue
Pain or burning in mouth	Nerve compression or ulceration
Loose teeth	Bone or gum invasion
Red or white patches (erythroplakia/leukoplakia)	Premalignant or malignant mucosal changes
Persistent bad breath	Tissue necrosis or infection
Hoarseness or voice change	Tumor involving vocal cords or throat
Swollen lymph nodes	Regional metastasis

🧪 Diagnostic Investigations

• Oral Examination – Visual inspection and palpation

• Biopsy – Gold standard; confirms malignancy (incisional or excisional)

• CT Scan / MRI – For tumor staging and assessing spread

• PET Scan – Detects distant metastases

• HPV Testing – Especially in oropharyngeal cancers

• Chest X-ray – Rule out lung metastasis

• Blood Tests – CBC, liver function, renal profile (for chemo planning)

💊 Medical Management

Approach	Examples
Chemotherapy	Cisplatin, 5-FU, paclitaxel – used for advanced or metastatic cases
Targeted Therapy	Cetuximab (EGFR inhibitor)
Radiotherapy	External beam radiation for localized tumors
Immunotherapy	Nivolumab, pembrolizumab in metastatic/refractory cases

🏥 Surgical Management

Procedure	Indication
Wide Local Excision	Removal of primary tumor
Mandibulectomy	Tumors involving jawbone
Neck Dissection	Lymph node involvement
Reconstructive Surgery	To restore function and appearance post-excision
Tracheostomy	Airway management in obstructive tumors

👩‍⚕️ Specific Nursing Management for Oral Cancer

1. Airway Maintenance

   • Monitor for airway obstruction, especially post-op or radiation swelling

2. Nutritional Support

   • Provide soft or enteral feeding if oral intake is compromised

   • Work with dietitians

3. Oral Hygiene

   • Use non-alcoholic mouthwash and soft applicators

   • Rinse with saline or sodium bicarbonate solution

4. Pain Management

   • Administer prescribed analgesics

   • Avoid spicy/hot foods

5. Speech & Communication Assistance

   • Use whiteboards or communication apps if surgery affects speech

6. Wound and Stoma Care

   • Post-surgical care of neck incisions, tracheostomy, or feeding tubes

7. Psychosocial Support

   • Body image counseling, oncology nurse navigator involvement

8. Patient Education

   • Avoid tobacco/alcohol

   • Teach self-exam of oral cavity

   • Importance of follow-up care

🩺 Nursing Process for Oral Cancer (ADPIE)

1. Assessment

• Subjective: Reports of mouth pain, difficulty swallowing, weight loss

• Objective: Visible oral lesion, swelling, speech difficulty, hoarseness

2. Nursing Diagnosis

• Impaired oral mucous membrane related to cancerous lesion

• Imbalanced nutrition: less than body requirements

• Risk for infection related to mucosal breakdown

• Disturbed body image related to facial disfigurement

• Ineffective airway clearance (post-op)

3. Planning

• Maintain adequate airway

• Demonstrate improved nutritional intake

• Verbalize understanding of disease and treatment

• Maintain positive coping strategies

4. Implementation

• Elevate head of bed; provide suctioning as needed

• Offer high-protein, soft diet or initiate PEG feeding

• Provide mouth care before/after meals

• Administer analgesics and antiemetics

• Encourage family involvement and counseling

5. Evaluation

• Patient maintains clear airway

• No signs of aspiration or infection

• Demonstrates adequate calorie intake

• Expresses understanding and positive adjustment

🛡️ Prevention & Health Promotion Tips

• Quit smoking and avoid secondhand smoke

• Limit alcohol consumption

• Maintain excellent oral hygiene

• Get HPV vaccination (for prevention of HPV-related oral cancers)

• Regular dental and oral cancer screenings

• Balanced diet rich in antioxidants and vitamins

✅ NCLEX MCQs

Want to test your understanding of oral cancer and related topics? Try our latest NCLEX-style MCQs with detailed rationales.

💊 Pharmacology

To learn more about medications used in stomatitis treatment, visit our Pharmacology notes for nursing students.