Tonsillitis

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Tonsil Basics - Ring of Fire

  • Waldeyer's Tonsillar Ring: A strategic collection of lymphoid tissue encircling the naso- and oropharynx.
  • Acts as the first line of immune defense; its inflammation is common, hence "Ring of Fire".
  • Key Components:
    • Pharyngeal tonsil (Adenoids): Located on the roof of the nasopharynx.
    • Palatine tonsils (Faucial): Situated in the oropharynx between palatal arches.
    • Lingual tonsil: Found at the base of the tongue.
    • Tubal tonsils (of Gerlach): Surround Eustachian tube openings. Anatomy of Waldeyer's tonsillar ring

⭐ Palatine tonsils are the largest lymphoid masses in Waldeyer's ring, especially prominent in children, and are the most frequently infected part (acute tonsillitis).

Bugs & Battles - The Infection Story

  • Common Culprits:
    • Viral (most frequent): Adenovirus, Rhinovirus, Influenza, EBV, Coxsackie A.
    • Bacterial: Streptococcus pyogenes (GAS) is the leading bacterial cause.
      • Others: Staph. aureus, H. influenzae, anaerobes.
  • Less Common:
    • Corynebacterium diphtheriae (greyish pseudomembrane).
    • Fungal (Candida in immunocompromised).
  • Spread & Attack:
    • Transmission: Droplet, direct contact.
    • Mechanism: Pathogens invade tonsillar crypts → inflammation, exudate.

⭐ Group A Streptococcus (GAS) accounts for 15-30% of acute pharyngitis in children and 5-15% in adults.

Symptoms & Signs - Spotting the Soreness

  • Key Complaints:
    • Sudden sore throat (odynophagia), painful swallowing (dysphagia)
    • Fever (often >38°C), headache, general malaise
  • On Examination:
    • Tonsils: Enlarged, erythematous; may show whitish/yellowish exudates (follicular spots or confluent membrane)
    • Pharynx: Inflamed pillars, soft palate, uvula
    • Halitosis (bad breath)
  • Associated Findings:
    • Tender, swollen jugulodigastric (tonsillar) lymph nodes
    • Referred ear pain (otalgia)
    • Children may present with abdominal pain, vomiting Acute tonsillitis with purulent exudates

⭐ Scarlet fever rash (sandpaper-like) with strawberry tongue indicates associated GABHS toxin production.

Diagnosis & Dangers - Tests & Troubles

  • Diagnosis:
    • Clinical: Acute sore throat, fever, odynophagia, tonsillar erythema/exudates, cervical lymphadenopathy.
    • Scoring: Centor/McIsaac criteria assess Group A Strep (GAS) probability.
    • Tests:
      • Throat Swab Culture: Gold standard for GAS.
      • Rapid Antigen Detection Test (RADT): Quick GAS detection.
      • Monospot test: For Infectious Mononucleosis.
  • Dangers (Complications):
    • Suppurative:
      • Peritonsillar Abscess (Quinsy): Most common. Hot potato voice.
      • Parapharyngeal/Retropharyngeal abscess.
      • Lemierre's Syndrome: IJV thrombophlebitis.
    • Non-Suppurative (Post-Strep):
      • Acute Rheumatic Fever (ARF).
      • Post-Streptococcal Glomerulonephritis (PSGN).
    • Severe tonsillar swelling → Airway obstruction.

⭐ Lemierre's syndrome ("forgotten disease"): IJV thrombophlebitis, post-anginal sepsis, often Fusobacterium necrophorum.

Tonsillitis: Causes, Diagnosis, and Treatment

Treatment Time - Fixing the Pharynx

  • Medical Management:

    • Analgesics, hydration, rest.
    • Antibiotics (bacterial): Penicillin V/Amoxicillin (7-10 days). Macrolides (allergy).
    • Saline gargles.
  • Surgical Management (Tonsillectomy Indications):

    • Recurrent acute tonsillitis (e.g., ≥7 episodes/year).
    • Complications: Peritonsillar abscess (Quinsy), airway obstruction (e.g., OSA).
    • Suspicion of malignancy.

⭐ One absolute indication for tonsillectomy is suspicion of malignancy in an enlarged tonsil, especially if unilateral.

High‑Yield Points - ⚡ Biggest Takeaways

  • Group A Streptococcus (GAS) is the most common bacterial cause; viral overall.
  • Centor criteria (Fever, Exudates, Tender Anterior Cervical Nodes, Absence of Cough) help diagnose GAS pharyngitis.
  • Key GAS complications: Rheumatic fever, PSGN, and Peritonsillar abscess (Quinsy).
  • Quinsy features unilateral swelling, uvular deviation, trismus, and "hot potato voice".
  • Penicillin (or Amoxicillin) is the drug of choice for GAS tonsillitis.
  • Tonsillectomy indications include recurrent infections (e.g., Paradise criteria), airway obstruction, or suspicion of malignancy.
  • Infectious Mononucleosis (EBV): exudative tonsillitis, posterior cervical lymphadenopathy, splenomegaly; avoid ampicillin (rash).

Practice Questions: Tonsillitis

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A patient presented with 2 days history of fever. On examination there was a swelling in the neck and one side tonsil was pushed to midline. What is the most likely diagnosis:-

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Flashcards: Tonsillitis

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Recurrent tonsillitis is described as:_____ episodes/yr for 3 consecutive years5 episodes/yr for 2 consecutive years or7 episodes in a single year.

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Recurrent tonsillitis is described as:_____ episodes/yr for 3 consecutive years5 episodes/yr for 2 consecutive years or7 episodes in a single year.

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