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Lateral Pharyngitis: Causes, Symptoms & Treatment

Lateral pharyngitis is an inflammation of the lateral bands of the throat lining. It causes sore throat, difficulty swallowing, and often occurs after tonsil removal.

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Things worth knowing about "Lateral Pharyngitis"

Lateral pharyngitis is an inflammation of the lateral bands of the throat lining. It causes sore throat, difficulty swallowing, and often occurs after tonsil removal.

What is Lateral Pharyngitis?

Lateral pharyngitis (also called lateral band angina or lateral pharyngeal band inflammation) is an inflammation of the lateral pharyngeal bands -- narrow strips of lymphatic tissue running along the sides of the back of the throat. These bands are part of the immune system of the upper respiratory tract and can become inflamed when pathogens invade the area.

This condition is particularly common in individuals who have had their tonsils (palatine tonsils) surgically removed. In such cases, the lymphatic tissue of the lateral bands takes on a compensatory immune function and may become more susceptible to infection and inflammation.

Causes

Lateral pharyngitis is most commonly caused by infectious agents:

Bacterial pathogens: Group A streptococci (especially Streptococcus pyogenes) and staphylococci are frequent causes.
Viral pathogens: Rhinoviruses, adenoviruses, and the Epstein-Barr virus can also trigger inflammation of the lateral bands.
Predisposing factors: A weakened immune system, exposure to cold, smoking, mouth breathing, and dry air can increase the risk of developing this condition.

Symptoms

The typical symptoms of lateral pharyngitis include:

Severe, one-sided or bilateral sore throat
Difficulty swallowing (odynophagia)
Pain radiating to one or both ears
Fever, often exceeding 38.5 degrees Celsius
General feeling of illness, fatigue, and malaise
Swollen lymph nodes in the neck
Reddened, swollen lateral bands in the throat, sometimes with yellowish-white deposits

Diagnosis

Diagnosis is typically made through a clinical examination. The physician inspects the throat and assesses the redness and swelling of the lateral bands. To distinguish between bacterial and viral infections, the following measures may be used:

Throat swab: To identify the causative pathogen, especially to detect Group A streptococci.
Rapid streptococcal antigen test: Provides results within a few minutes and can help determine whether antibiotic therapy is necessary.
Blood count: May be performed if a more complex infection or systemic involvement is suspected.

Treatment

General Measures

Regardless of the underlying cause, the following supportive measures are generally recommended:

Adequate rest and physical recovery
Drinking plenty of fluids such as water and herbal teas
Gargling with salt water or antiseptic solutions to relieve symptoms
Throat lozenges with local anesthetic or antiseptic properties
Warm neck compresses to ease pain and discomfort

Medical Treatment

Pain relievers and fever reducers: Ibuprofen or paracetamol (acetaminophen) can effectively relieve pain and reduce fever.
Antibiotics: When a bacterial infection has been confirmed -- particularly by streptococci -- antibiotic therapy is initiated, most commonly with penicillin or amoxicillin. The full course must be completed as prescribed (typically 7--10 days) to prevent complications and antibiotic resistance.

Complications

In rare cases, untreated or poorly managed lateral pharyngitis can lead to complications, including:

Peritonsillar or parapharyngeal abscess
Spread of infection to adjacent structures
In streptococcal infections: rheumatic fever or kidney disease (post-streptococcal glomerulonephritis)

References

Robert Koch Institute (RKI): Fact Sheets on Infectious Diseases -- Streptococcal Infections. Berlin, 2023.
Stuck, B.A. et al.: AWMF Clinical Guideline: Sore Throat. AWMF Register No. 053-010. Association of the Scientific Medical Societies in Germany, 2020.
Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. 9th Edition. Elsevier, Philadelphia, 2020.

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