The image displays an inflamed oropharynx with diffuse erythema, a swollen uvula, and multiple punctate lesions on the posterior pharyngeal wall. Which of the following is the most likely diagnosis?

Explanation

## Image Findings * **Diffuse erythema** of the posterior pharyngeal wall and tonsillar pillars. * **Swollen and erythematous uvula**. * Presence of multiple small, **whitish, punctate lesions** (likely inflamed lymphoid follicles or early exudates) on the posterior pharyngeal wall. ## Diagnosis **Key Point:** The image findings of diffuse pharyngeal erythema, swollen uvula, and punctate lesions are highly suggestive of **Streptococcal pharyngitis**. Streptococcal pharyngitis, commonly caused by **Group A Streptococcus (GAS)**, presents with a characteristic "beefy red" pharynx, often with **tonsillar exudates** (though not overtly large exudates here, punctate lesions can represent early inflammation or lymphoid hyperplasia), **petechiae on the soft palate** (not clearly visible but can be associated), and a **swollen uvula**. The punctate lesions seen on the posterior pharyngeal wall are likely inflamed lymphoid follicles, a common finding in pharyngitis, but in the context of diffuse erythema and swollen uvula, point towards a bacterial etiology, particularly streptococcal. ## Differential Diagnosis | Feature | Streptococcal Pharyngitis | Viral Pharyngitis | Fungal Pharyngitis (Candidiasis) | Diphtheria | | :------------------ | :------------------------------------------------------ | :---------------------------------------------------- | :---------------------------------------------------- | :---------------------------------------------------- | | **Erythema** | Diffuse, intense ("beefy red") | Mild to moderate | Variable, often underlying white patches | Variable, often with a grey membrane | | **Exudates/Lesions**| Punctate lesions, often tonsillar exudates (white/yellow) | Usually absent, sometimes vesicles/ulcers (herpes) | White, creamy, adherent patches (pseudomembranes) | Thick, grey, adherent pseudomembrane | | **Uvula** | Often swollen and erythematous | Usually normal | Normal or mildly inflamed | May be covered by membrane | | **Cervical Nodes** | Tender anterior cervical lymphadenopathy | Variable, often posterior cervical | Less common | Marked cervical lymphadenopathy ("bull neck") | | **Systemic Symptoms**| High fever, headache, abdominal pain, vomiting | Cough, coryza, conjunctivitis, hoarseness (viral prodrome) | Oral discomfort, dysphagia, burning sensation | Severe systemic toxicity, airway obstruction | ## Clinical Relevance **Clinical Pearl:** Prompt diagnosis and treatment of streptococcal pharyngitis are crucial to prevent serious complications such as **acute rheumatic fever** and **post-streptococcal glomerulonephritis**. ## High-Yield for NEET PG **High-Yield:** The **Centor criteria** (or modified Centor score) are commonly used to assess the probability of streptococcal pharyngitis and guide management (e.g., rapid strep test, antibiotic prescription). Key criteria include tonsillar exudates, swollen/tender anterior cervical lymph nodes, absence of cough, and history of fever. **Key Point:** **Penicillin V** is the drug of choice for Group A Streptococcal pharyngitis. For penicillin-allergic patients, **azithromycin** or **cephalexin** can be used. ## Common Traps **Warning:** Do not confuse viral pharyngitis with bacterial pharyngitis solely based on erythema. Look for specific features like exudates, petechiae, or the absence of viral prodrome symptoms. The presence of punctate lesions on the posterior pharyngeal wall in the absence of typical viral symptoms strongly favors a bacterial etiology. ## Reference [cite:Harrison's Principles of Internal Medicine, 20th Ed, Chapter 165: Streptococcal Infections]