Laryngeal Cancer

Laryngeal cancer is a malignant tumor arising from the tissues of the larynx and is one of the most common cancers of the head and neck region. It occurs predominantly in men and is strongly associated with tobacco smoking and alcohol consumption.

The larynx is anatomically divided into three major regions:

• Supraglottis – the region above the vocal cords.

• Glottis – the region containing the vocal cords.

• Subglottis – the region below the vocal cords.

The clinical presentation depends on the site of origin, tumor size, and extent of local invasion. Early diagnosis is essential because localized disease has better treatment outcomes.

Epidemiology

Laryngeal cancer is a common malignancy of the upper aerodigestive tract. It occurs more frequently in males and is strongly associated with lifestyle-related risk factors.

Glottic tumors often present earlier due to voice changes, while supraglottic and subglottic tumors may present later because symptoms develop after significant progression.

Risk factors

Risk factors associated with laryngeal cancer include:

• Tobacco smoking.

• Alcohol consumption.

• Increasing age.

• Male sex.

• Occupational exposure to carcinogens.

• Previous radiation exposure.

• Human papillomavirus (HPV) infection.

• Chronic irritation of the larynx.

Pathophysiology

Laryngeal cancer develops due to malignant transformation of epithelial cells lining the larynx, most commonly squamous epithelial cells.

Progressive genetic changes lead to:

• Abnormal cellular proliferation.

• Local tissue invasion.

• Vocal cord impairment.

• Extension into surrounding structures.

• Regional lymph node metastasis.

• Distant metastasis in advanced disease.

The pattern of spread depends on the anatomical site of the primary tumor.

Clinical presentation

Symptoms vary depending on whether the tumor arises from the supraglottic, glottic, or subglottic region.

Glottic tumors commonly present early with voice changes, whereas tumors in other regions may present with airway obstruction or swallowing difficulties.

Symptoms

Common symptoms include:

• Hoarseness of voice.

• Stridor.

• Difficulty in breathing.

• Neck mass.

• Odynophagia (painful swallowing).

• Persistent cough.

• Difficulty swallowing.

• Foreign body sensation in the throat.

• Symptoms related to advanced disease.

Clinical signs

Clinical findings may include:

• Persistent hoarseness.

• Inspiratory stridor.

• Cervical lymphadenopathy.

• Visible laryngeal lesion on examination.

• Reduced vocal cord movement.

• Signs of airway obstruction.

• Evidence of local invasion in advanced disease.

Differential diagnosis

Conditions that may mimic laryngeal cancer include:

• Laryngitis.

• Vocal cord nodules.

• Vocal cord polyps.

• Laryngeal papilloma.

• Tuberculosis of the larynx.

• Benign laryngeal tumors.

• Thyroid malignancy invading the larynx.

• Hypopharyngeal cancer.

Diagnostic criteria

Laryngeal cancer should be suspected in patients presenting with:

• Persistent hoarseness.

• Stridor.

• Progressive difficulty in breathing.

• Neck mass.

• Odynophagia.

• Persistent cough.

Definitive diagnosis requires histopathological confirmation from biopsy of the primary tumor.

Investigations

Laboratory investigations

• Full blood count (FBC).

• Renal function tests (RFT).

• Liver function tests (LFT).

Imaging investigations

• Chest X-ray (CXR).

• Computed tomography (CT) scan of the head and neck.

• Magnetic resonance imaging (MRI) of the head and neck.

Imaging helps assess:

• Tumor extent.

• Cartilage involvement.

• Regional lymph node involvement.

• Possible metastatic disease.

Endoscopic evaluation

• Laryngoscopy.

Histopathological investigation

Definitive diagnosis is confirmed by:

• Laryngoscopy-guided biopsy of the primary tumor.

Diagnostic staging

Laryngeal cancer is staged using:

• TNM staging system.

Management

Management depends on:

• Tumor location.

• Disease stage.

• Functional status of the larynx.

• Patient general condition.

Treatment options include:

• Surgery.

• Radiotherapy.

• Chemoradiotherapy.

• Palliative care.

A multidisciplinary approach involving head and neck surgeons, oncologists, radiologists, and other specialists is recommended.

Non-pharmacological treatment

Surgical treatment

Surgery is an important treatment option depending on tumor stage and location.

Early-stage disease (Stage I and II)

Options include:

• Partial laryngectomy.

• Total laryngectomy.

OR

• Radiotherapy alone.

Advanced disease (Stage III–IVB)

Treatment options include:

• Concurrent chemoradiotherapy.

OR

• Total laryngectomy with neck dissection.

This may be followed by:

• Adjuvant radiotherapy.

• Chemoradiotherapy.

Radiotherapy

Radiotherapy may be used:

• As definitive treatment in early-stage disease.

• As part of combined treatment in advanced disease.

• As adjuvant treatment after surgery.

Pharmacological treatment

(No chemotherapy regimen or specific drug doses were provided in the source information; therefore, no additional drug regimens are added.)

Chemotherapy may be used as part of:

• Concurrent chemoradiotherapy for locally advanced disease.

• Adjuvant treatment after surgery in selected patients.

• Palliative treatment in advanced disease.

Management according to disease stage

Stage I and II

Treatment options:

• Partial laryngectomy.

• Total laryngectomy.

• Radiotherapy alone.

Choice depends on:

• Tumor location.

• Extent of disease.

• Functional preservation considerations.

Stage III–IVB

Treatment options:

• Concurrent chemoradiotherapy.

OR

• Total laryngectomy and neck dissection.

Followed by:

• Adjuvant radiotherapy.

• Chemoradiotherapy.

Stage IVC

Management:

• Palliative care.

Goals include:

• Symptom control.

• Maintaining quality of life.

• Management of complications.

Referral

All patients with suspected or confirmed laryngeal cancer should be referred to a specialized head and neck oncology center for:

• Diagnostic confirmation.

• Staging.

• Multidisciplinary treatment planning.

Urgent referral is required for:

• Persistent hoarseness.

• Stridor.

• Progressive airway obstruction.

• Neck mass.

• Difficulty swallowing.

Complications

Complications may include:

• Airway obstruction.

• Aspiration.

• Difficulty swallowing.

• Voice loss.

• Cervical lymph node metastasis.

• Local recurrence.

• Distant metastasis.

• Nutritional problems.

• Treatment-related complications.

Prognosis

Prognosis depends on:

• Stage at diagnosis.

• Tumor location.

• Lymph node involvement.

• Response to treatment.

• Ability to preserve laryngeal function.

Early-stage disease has better outcomes, while advanced disease is associated with increased morbidity and reduced survival.

Prevention

Preventive measures include:

• Avoidance of tobacco smoking.

• Reduction of alcohol consumption.

• Occupational protection from carcinogenic exposures.

• Early assessment of persistent voice changes.

• Prompt evaluation of suspicious head and neck symptoms.

Follow-up

Patients require regular follow-up after treatment to assess:

• Local recurrence.

• Regional lymph node recurrence.

• Distant metastasis.

• Functional outcomes.

• Treatment complications.

Follow-up may include:

• Clinical examination.

• Laryngoscopic evaluation when indicated.

• Imaging studies when clinically required.