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Oropharyngeal Cancer in Singapore

Receiving an oropharyngeal cancer diagnosis or experiencing concerning throat symptoms can be overwhelming. Oropharyngeal cancer affects the middle part of the throat, including the base of the tongue, tonsils, soft palate, and throat walls. Contemporary medical approaches may help improve treatment outcomes and quality of life for patients. Our ENT Specialist provides comprehensive evaluation and treatment approaches tailored to each patient’s specific situation, helping you navigate this journey with professional medical support and care. Individual results and timelines may vary.

doctor img
Dr Gan Eng Cern

MBBS

MRCS (Edin)

mmed (orl)

FAMS

Image Laryngeal Papillomatosis

What is Oropharyngeal Cancer?

Oropharyngeal cancer is a type of head and neck cancer that develops in the oropharynx, the middle section of your throat behind your mouth. This area includes the back third of your tongue, tonsils, soft palate, and throat walls. The oropharynx plays a crucial role in swallowing and speaking, making early detection and treatment important for maintaining these vital functions.

Oropharyngeal cancer represents a portion of all head and neck cancers. The incidence has been evolving in recent years, with HPV-related oropharyngeal cancers becoming more common, particularly among younger patients. This shift in disease patterns has led to changes in treatment approaches and may affect prognosis for certain patient groups.

Types of Oropharyngeal Cancer

  • Squamous Cell Carcinoma: Squamous cell carcinoma represents the majority of oropharyngeal cancers. These cancers develop from the thin, flat cells lining the throat. They can be classified as HPV-positive or HPV-negative, which may impact treatment planning and prognosis. HPV-positive tumours may respond differently to treatment.
  • Minor Salivary Gland Cancers: These rare cancers originate from the small salivary glands scattered throughout the oropharynx. They include adenoid cystic carcinoma, mucoepidermoid carcinoma, and adenocarcinoma. These cancers often have different growth patterns and treatment requirements compared to squamous cell carcinomas.
  • Lymphomas: Lymphomas can develop in the lymphoid tissue of the tonsils or base of tongue. These cancers arise from immune system cells and require different treatment approaches than other oropharyngeal cancers, typically involving chemotherapy as the primary treatment.

Causes & Risk Factors

Causes

Oropharyngeal cancer develops when genetic mutations cause throat cells to grow uncontrollably. Human papillomavirus (HPV) infection, particularly HPV type 16, is recognised as a cause. The virus integrates into cellular DNA, disrupting normal cell growth regulation. Traditional causes include long-term exposure to tobacco carcinogens and alcohol, which damage cellular DNA through direct toxic effects and oxidative stress.

Risk Factors

  • HPV infection: Particularly HPV-16 and HPV-18 strains
  • Tobacco use: Including cigarettes, cigars, pipes, and chewing tobacco
  • Heavy alcohol consumption: Especially when combined with tobacco use
  • Age: More common in older adults, though HPV-related cases can occur in younger patients
  • Gender: More common in men than women
  • Previous radiation exposure: To the head and neck region
  • Weakened immune system: Due to conditions or medications
  • Poor oral hygiene: May contribute to increased risk
  • Diet low in fruits and vegetables: Lack of protective antioxidants
  • Betel nut chewing: Common risk factor in Southeast Asian populations
  • Occupational exposures: Certain chemicals and wood dust

Signs & Symptoms

Early Symptoms

  • Persistent sore throat lasting more than 2-3 weeks
  • Difficulty or pain when swallowing
  • Ear pain on one side without hearing loss
  • Feeling of something stuck in the throat
  • Voice changes or hoarseness
  • Unexplained weight loss
  • Persistent bad breath

Advanced Symptoms

  • Visible mass or ulcer in the throat
  • Difficulty opening mouth fully (trismus)
  • Bleeding from the mouth or throat
  • Difficulty breathing or noisy breathing
  • Difficulty swallowing solids or liquids
  • Ear pain
  • Numbness in the mouth or face
  • Swollen lymph nodes in the neck

Late Stage Symptoms

  • Inability to swallow
  • Breathing difficulties
  • Weight loss and malnutrition
  • Spread to distant organs causing specific symptoms
  • Pain requiring pain management

Some early symptoms of oropharyngeal cancer can mimic common throat infections or other benign conditions. Persistence of symptoms may warrant medical evaluation.

Experiencing these symptoms?

Consult with an ENT Specialist for proper evaluation and diagnosis.

Human head sinus structure

When to See an ENT Specialist

Seek immediate medical attention if you experience a persistent sore throat lasting more than two weeks, difficulty swallowing that worsens over time, or unexplained ear pain on one side. Other red flag symptoms include voice changes lasting more than two weeks, a lump in your neck, unexplained weight loss, or bleeding from your mouth or throat. These symptoms don’t necessarily mean you have cancer, but they require professional evaluation to determine the cause.

Seek treatment as soon as persistent symptoms develop. Early-stage oropharyngeal cancer may have different treatment options and outcomes. During your first consultation, an ENT specialist will conduct a thorough examination of your throat, mouth, and neck. This typically includes using specialised instruments to visualise the oropharynx and may involve a flexible endoscope to examine areas not visible during routine examination. The consultation provides an opportunity to discuss your symptoms, medical history, and any concerns you may have.

Image throat trauma diagnosis Image throat trauma diagnosis

Diagnosis & Testing Methods

Accurate diagnosis of oropharyngeal cancer requires a systematic approach combining clinical examination with diagnostic procedures. The initial evaluation begins with a comprehensive physical examination of your mouth, throat, and neck. An ENT specialist uses specialised mirrors and lights to examine hard-to-see areas of your oropharynx.

Flexible nasopharyngoscopy allows detailed visualisation of your throat using a thin, flexible tube with a camera. This procedure is performed in the clinic with local anaesthetic spray and provides visual assessment of any abnormal areas.

If suspicious areas are identified, a biopsy may be recommended for definitive diagnosis. This may be performed in the clinic under local anaesthesia for accessible lesions, or under general anaesthesia for deeper areas. Tissue samples are examined by pathologists to confirm the presence and type of cancer cells.

Imaging studies play a role in staging the cancer. CT scans provide detailed images of the primary tumour and neck lymph nodes. MRI scans offer soft tissue detail and can be useful for assessing tongue base tumours. PET-CT scans help detect distant spread and are used for treatment planning.

HPV testing on biopsy samples has become standard practice, as HPV status can influence treatment decisions and prognosis. Individual results and timelines may vary. This information is provided for educational purposes and does not replace consultation with a healthcare professional.

Treatment Options Overview

Radiation Therapy

Radiation therapy uses high-energy beams to target cancer cells and is a treatment option for oropharyngeal cancer. Modern techniques like intensity-modulated radiation therapy (IMRT) allow targeting of tumours whilst aiming to minimise impact on surrounding healthy tissue. Treatment typically involves daily sessions over several weeks. Radiation can be used as primary treatment for early-stage cancers or combined with chemotherapy for more advanced cases. Side effects may include sore throat, difficulty swallowing, dry mouth, and skin changes, which are managed with supportive care throughout treatment.

Chemotherapy

Chemotherapy uses medications to target cancer cells throughout the body. For oropharyngeal cancer, it’s often combined with radiation therapy (chemoradiation) to enhance treatment effectiveness. Common chemotherapy drugs include cisplatin, carboplatin, and fluorouracil. Treatment schedules vary but typically involve weekly or three-weekly cycles during radiation therapy. Chemotherapy may also be used before primary treatment to reduce tumour size or after treatment to target remaining cancer cells. The medical oncology team monitors patients during treatment to manage side effects and adjust protocols as needed.

Immunotherapy

Immunotherapy represents a treatment approach that aims to help the immune system recognise and attack cancer cells. Drugs like pembrolizumab and nivolumab may be used in treating recurrent or metastatic oropharyngeal cancer. These treatments can work in patients with HPV-positive cancers. Immunotherapy is typically administered intravenously. While generally well-tolerated, immune-related side effects require monitoring and management by experienced oncology teams.

Targeted Therapy

Targeted therapy drugs focus on specific molecular features of cancer cells. Cetuximab, which targets the EGFR protein, may be used with radiation therapy in certain cases. These treatments may offer benefits with potentially different side effect profiles than traditional chemotherapy. Ongoing research continues to identify new targets and develop targeted agents for oropharyngeal cancer treatment.

Surgical Treatments

  • Transoral Robotic Surgery (TORS): TORS is a minimally invasive surgical approach for removing oropharyngeal tumours through the mouth. This technique uses robotic instruments to provide visualisation and tumour removal whilst aiming to preserve surrounding structures. TORS may be suitable for early-stage tumours and selected advanced cases. Recovery may be faster than traditional open surgery, with patients able to resume normal diet within weeks. The procedure requires specialised expertise and equipment available at medical centres.
  • Traditional Open Surgery: Open surgical approaches may be necessary for larger tumours or those not suitable for transoral techniques. These procedures involve accessing the tumour through incisions in the neck or by temporarily splitting the jaw. Open surgery allows tumour removal and neck dissection when needed. Reconstruction may be required to restore function and appearance, involving plastic surgery techniques and sometimes tissue transfer from other body parts.
  • Neck Dissection: Oropharyngeal cancers can spread to lymph nodes in the neck, which may require neck dissection for treatment. This procedure removes lymph nodes and surrounding tissue to address cancer spread. Modified techniques aim to preserve important structures like nerves and blood vessels when possible. Neck dissection may be performed alongside primary tumour removal or as a separate procedure following radiation therapy.

Every patient’s condition is unique.

Our ENT Specialist will assess your specific situation and recommend the most suitable treatment approach for you.

Human head sinus structure

Complications if Left Untreated

Without treatment, oropharyngeal cancer may progressively grow and invade surrounding structures. Local progression can potentially obstruct the airway, which may make breathing difficult. The ability to swallow may deteriorate, potentially leading to malnutrition, dehydration, and aspiration pneumonia. Speech may become increasingly impaired as tumours can affect the tongue and throat structures.

The cancer may spread to lymph nodes in the neck, potentially causing visible swelling and compressing vital structures like blood vessels and nerves. Distant metastasis to lungs, bones, or liver can occur, potentially causing organ-specific complications. Pain may intensify as the tumour grows, which can impact quality of life.

Untreated oropharyngeal cancer may affect multiple body systems. Nutritional deficiency can weaken the immune system and impair healing. Chronic pain and physical limitations may lead to psychological distress and social isolation. The window for curative treatment may narrow as the disease advances. Individual disease progression and outcomes vary. Early consultation with a healthcare professional is important for appropriate management and care planning.

Prevention

While not all oropharyngeal cancers can be prevented, several strategies may help reduce risk. HPV vaccination can help prevent HPV-related oropharyngeal cancers. The Singapore National Childhood Immunisation Programme includes HPV vaccination, and adults who haven’t been vaccinated should discuss this option with their healthcare provider.

Tobacco cessation is important, as smoking and tobacco use are recognised risk factors. Singapore offers smoking cessation programmes through polyclinics and hospitals. Limiting alcohol consumption may also help reduce risk, particularly when combined with avoiding tobacco.

Maintaining good oral hygiene through regular dental care may help reduce risk. A diet rich in fruits and vegetables provides antioxidants and nutrients. Regular dental check-ups allow early detection of suspicious lesions. For those with occupational exposures, following workplace safety guidelines and using appropriate protective equipment is important. Individual risk factors and prevention effectiveness may vary. Consult with a healthcare professional for personalised advice.

For Singaporeans & Singapore Permanent Residents

Medisave & Insurance Shield Plan approved

Your ENT procedure may be eligible for Medisave claims, with the claimable amount varying based on the procedure’s complexity. For additional options, including the use of your insurance or Integrated Shield Plan, reach out to our friendly clinic staff today for assistance.

Frequently Asked Questions (FAQ)

What is the prognosis for oropharyngeal cancer in Singapore?

Prognosis varies based on stage at diagnosis, HPV status, and overall health. HPV-positive oropharyngeal cancers may have different treatment outcomes compared to HPV-negative cancers. Early detection and treatment may improve prognosis. An ENT specialist will discuss your specific situation and potential outcomes based on your individual factors during consultation.

How does HPV-positive oropharyngeal cancer differ from HPV-negative cancer?

HPV-positive oropharyngeal cancers may occur in younger patients, often non-smokers, and may respond differently to treatment. These cancers may present with smaller primary tumours but may have larger lymph node involvement. HPV-negative cancers are usually associated with tobacco and alcohol use, occur in older patients, and may require different treatment approaches. Treatment approaches are increasingly tailored based on HPV status, with ongoing research exploring modified strategies for HPV-positive cancers to reduce treatment side effects whilst maintaining effectiveness.

What are the long-term side effects of oropharyngeal cancer treatment?

Long-term effects vary depending on treatment type and extent. Radiation therapy may cause dry mouth (xerostomia), taste changes, dental problems, and neck stiffness. Some patients may experience difficulty swallowing requiring dietary modifications. Thyroid function may be affected, potentially requiring hormone replacement. Surgery can impact speech and swallowing, though rehabilitation helps support function. Chemotherapy may cause hearing changes or neuropathy. A multidisciplinary team provides comprehensive support to manage these effects, including dental care, speech therapy, nutritional support, and rehabilitation services.

Can oropharyngeal cancer return after treatment?

Recurrence is possible, with risk varying among individuals. Regular follow-up examinations are important for monitoring. Follow-up typically includes physical examinations and imaging studies performed based on individual risk factors. HPV-positive cancers may have different recurrence patterns than HPV-negative cancers. Lifestyle modifications including tobacco cessation and limiting alcohol may help reduce recurrence risk. Any new or returning symptoms should be evaluated promptly.

What support services are available for oropharyngeal cancer patients in Singapore?

Singapore offers comprehensive support services for cancer patients. The Singapore Cancer Society provides counselling, support groups, and financial assistance programmes. Hospital-based services include medical social workers, dietitians, speech therapists, and psychologists. Rehabilitation programmes help support function after treatment. Palliative care services support quality of life throughout the cancer journey. Support groups connect patients with others facing similar challenges. Healthcare teams coordinate with these services to provide comprehensive care addressing medical, psychological, and social needs throughout treatment and recovery.

How long does treatment for oropharyngeal cancer typically take?

Treatment duration varies based on the approach chosen. Radiation therapy alone typically involves daily treatments over several weeks. Concurrent chemoradiation follows a similar timeline with chemotherapy given during radiation. Surgery may require several hours for the procedure itself, with hospital stays varying depending on extent. Recovery and healing continue for several weeks to months. Some patients may need additional treatments based on pathology results. The treatment journey, from diagnosis through initial recovery, varies by individual case, with long-term follow-up continuing for years.

Conclusion

Oropharyngeal cancer presents significant challenges, but advances in treatment may help improve outcomes for patients. Early detection remains important for treatment planning and preserving function. Understanding the various treatment options available, from minimally invasive surgery to modern radiation techniques and systemic therapies, can help patients make informed decisions about their care. With comprehensive treatment from specialists and support systems, patients may be able to navigate their cancer journey while maintaining quality of life.

 

Take the First Step Towards Better Health

Living with oropharyngeal cancer concerns can be challenging, but you don’t have to face it alone. Our ENT Specialist has experience diagnosing and treating oropharyngeal cancer using current evidence-based approaches.

Human head sinus structure
ENT Specialist in Singapore | Dr Gan Eng Cern

Dr Gan Eng Cern

MBBS

MRCS (Edin)

mmed (orl)

FAMS

With over 15 years of experience, Dr Gan specialises in the comprehensive management of a broad range of conditions related to the ear, nose and throat (ENT), and head and neck.

Dr. Gan has contributed to the academic field as a Senior Clinical Lecturer at the Yong Loo Lin School of Medicine, National University of Singapore. He underwent his subspecialty training in Rhinology (Nose & Sinus conditions) and Endoscopic Skull Base Surgery at the renowned St Paul’s Sinus Center, part of the University of British Columbia in Vancouver, Canada. He is recognised for his extensive research work, with numerous contributions to reputable international ENT journals. Dr Gan is also highly sought after as a speaker and has shared his surgical knowledge as a surgical dissection teacher at various prominent ENT conferences and courses.

  • 2020 – Reader’s Choice Gold Award for Best ENT Specialist (Expat Living Singapore)
  • 2016 – Best Educator Award (Eastern Health Alliance)
  • 2016 – “Wow” Award (Patient Compliment)
  • 2014 – Eastern Health Alliance Caring Award – Silver
  • 2014 – 19th Yahya Cohen Memorial Lectureship (awarded by the College of Surgeons, Academy of Medicine Singapore for best scientific surgical paper)
  • 2012 – Human Manpower Development Award (Ministry of Health, Singapore)
  • 2007 – Singhealth Best Doctor Award

Qualifications

  • MBBS – Bachelor of Science, Bachelor of Medicine, Bachelor of Surgery (University of New South Wales, Sydney, Australia)
  • MRCS (Edin) – Member of the Royal College of Surgeons Edinburgh, United Kingdom
  • MMed (ORL) – Master of Medicine in ENT (National University of Singapore)
  • FAMS – Fellow of the Academy of Medicine Singapore
Singapore ENT specialist performing a procedure

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    A Specialist Clinic for Sinus, Snoring & ENT

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    Mount Elizabeth Novena Hospital
    Singapore 329563

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