Retropharyngeal Abscess Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for Retropharyngeal Abscess. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Retropharyngeal Abscess Indian Medical PG Question 1: Not true about parapharyngeal abscess?
- A. Torticollis
- B. Trismus
- C. Drooling of saliva
- D. Horner's syndrome (Correct Answer)
Retropharyngeal Abscess Explanation: ***Horner's syndrome***
- While parapharyngeal abscess is close to the **sympathetic chain**, Horner's syndrome (ptosis, miosis, anhydrosis) is a **rare complication**, not a common or typical presentation, making this statement the most likely to be false regarding usual clinical features.
- The inflammatory process usually affects the adjacent structures, such as pterygoid muscles, pharyngeal muscles, and carotid sheath, rather than directly compressing the **sympathetic fibers** in the majority of cases.
*Torticollis*
- **Torticollis**, or neck stiffness and deviation, is a common symptom due to irritation and spasm of the neck muscles adjacent to the inflamed parapharyngeal space.
- The inflammatory process can cause pain and muscle guarding, leading to the characteristic head tilt.
*Drooling of saliva*
- **Drooling of saliva** occurs due to odynophagia (painful swallowing) and dysphagia (difficulty swallowing) making patients reluctant to swallow, allowing saliva to accumulate and spill from the mouth.
- The inflammation and swelling in the parapharyngeal space can obstruct the pharynx, making swallowing difficult and painful.
*Trismus*
- **Trismus**, or difficulty opening the mouth, is a characteristic feature of parapharyngeal abscess due to inflammation and spasm of the **medial pterygoid muscle**, which is located near the parapharyngeal space.
- The abscess can directly irritate or compress the **masticatory muscles**, limiting jaw movement.
Retropharyngeal Abscess Indian Medical PG Question 2: What is the best imaging modality for detecting early osteomyelitis?
- A. CT scan
- B. X-ray
- C. MRI (Correct Answer)
- D. Bone scintigraphy
Retropharyngeal Abscess Explanation: ***MRI***
- **Magnetic Resonance Imaging (MRI)** is considered the **gold standard** for detecting early osteomyelitis due to its excellent soft tissue contrast and ability to visualize **bone marrow edema**, which is an early sign of infection.
- It can identify changes within **3-5 days** of infection onset, much earlier than other modalities.
*CT scan*
- While useful for showing **bone destruction**, cortical integrity, and sequestra, **CT scans** are less sensitive than MRI for detecting early marrow edema.
- Its ability to diagnose osteomyelitis is usually delayed until significant **bony changes** have occurred, typically around 1-2 weeks.
*X-ray*
- **Plain radiographs** are often the initial imaging study but are **insensitive** for early osteomyelitis, showing changes only after 10-14 days or more.
- Early findings on X-rays can be subtle, such as **periosteal elevation** or **soft tissue swelling**, but frank bone destruction is a late finding.
*Bone scintigraphy*
- **Bone scintigraphy** (e.g., technetium-99m) is sensitive for detecting increased bone turnover associated with infection but lacks **specificity**, as it can be positive in other conditions like trauma or tumors.
- While it can detect changes earlier than X-rays, typically within 2-3 days, it cannot clearly differentiate infection from other processes, and its spatial resolution is poor compared to MRI.
Retropharyngeal Abscess Indian Medical PG Question 3: What is the most appropriate antibiotic choice for a 4-year-old unvaccinated child with epiglottitis?
- A. Administering a vaccine
- B. Doxycycline for 4 days
- C. Immediate airway assessment and management
- D. Ceftriaxone or cefotaxime (Correct Answer)
Retropharyngeal Abscess Explanation: ***Ceftriaxone or cefotaxime***
- **Third-generation cephalosporins** are the **first-line antibiotics** for epiglottitis in children
- Provide excellent coverage against ***Haemophilus influenzae* type b (Hib)**, the most common causative organism in unvaccinated children
- Effective against **both beta-lactamase producing and non-producing strains**, addressing the widespread ampicillin resistance (20-40%)
- **Ceftriaxone** (50-100 mg/kg/day) or **cefotaxime** (150-200 mg/kg/day divided) are standard of care
- Treatment duration is typically **7-10 days**
*Immediate airway assessment and management*
- While this is the **most critical priority** in epiglottitis management (life-threatening airway obstruction risk), the question specifically asks for **antibiotic choice**
- Airway management is a procedural intervention, not antimicrobial therapy
- In clinical practice, airway assessment comes first, but this doesn't answer the question asked
*Administering a vaccine*
- **Hib vaccine** is a **preventive measure**, not a treatment for active infection
- Vaccination during acute epiglottitis has no therapeutic benefit
- The vaccine prevents future disease but does not treat current infection
*Doxycycline for 4 days*
- **Not first-line therapy** for epiglottitis in any age group
- **Contraindicated in children under 8 years** due to risk of permanent **tooth discoloration** and enamel hypoplasia
- Poor coverage against *H. influenzae* type b
- Tetracyclines are not recommended for typical bacterial causes of epiglottitis
Retropharyngeal Abscess Indian Medical PG Question 4: A 25-year-old woman presents with severe throat pain, difficulty swallowing, and trismus. CT neck shows a peritonsillar fluid collection and inflammation. What is the next best step?
- A. Immediate tonsillectomy
- B. Needle aspiration and antibiotics (Correct Answer)
- C. Oral corticosteroids
- D. Empirical antibiotics alone
Retropharyngeal Abscess Explanation: ***Needle aspiration and antibiotics***
- The presence of a **peritonsillar fluid collection** on CT neck, along with severe throat pain, **dysphagia**, and **trismus**, is indicative of a **peritonsillar abscess (PTA)**.
- **Needle aspiration** provides immediate relief by draining the pus and allows for culture-guided antibiotic therapy, while broad-spectrum **antibiotics** address the bacterial infection.
*Immediate tonsillectomy*
- **Tonsillectomy** is generally reserved for recurrent peritonsillar abscesses or chronic tonsillitis, not as the primary immediate treatment for an acute PTA.
- Doing so acutely carries a higher risk of complications due to the **inflammation** and potential compromise of the airway.
*Oral corticosteroids*
- While corticosteroids can reduce inflammation and pain, they do not resolve the underlying bacterial infection or drain the **pus collection**.
- Using **corticosteroids alone** risks worsening the infection by masking symptoms without treating the cause.
*Empirical antibiotics alone*
- Although antibiotics are crucial for treating the bacterial infection, they may not be sufficient on their own to resolve a **frank abscess**, especially one causing significant symptoms.
- **Drainage** is often necessary to achieve clinical improvement and prevent complications such as airway obstruction or spread of infection.
Retropharyngeal Abscess Indian Medical PG Question 5: A 2 year child presented with low grade fever and stridor. What is the likely diagnosis?
- A. Acute Laryngotracheobronchitis (Correct Answer)
- B. Acute Bacterial Tracheitis
- C. Acute Epiglottitis
- D. Foreign Body aspiration
Retropharyngeal Abscess Explanation: ***Acute Laryngotracheobronchitis***
- The combination of **low-grade fever** and **stridor** in a 2-year-old child strongly suggests **croup**, which is medically known as acute laryngotracheobronchitis.
- Croup is characterized by **inflammation** of the larynx, trachea, and bronchi, often presenting with a **barking cough** and inspiratory stridor. The X-ray image would show the characteristic **steeple sign**.
*Acute Bacterial Tracheitis*
- This is a more severe bacterial infection that can present with stridor but typically shows **higher fever**, **toxic appearance**, and rapid clinical deterioration.
- Unlike croup, bacterial tracheitis patients appear **more ill** and may have **purulent secretions** requiring more aggressive management.
*Acute Epiglottitis*
- A serious condition characterized by **rapid onset of high fever**, **dysphagia**, drooling, and a **"tripod" position**, which are not indicated by the given symptoms.
- The stridor in epiglottitis is typically quieter and may indicate more severe airway obstruction compared to the characteristic stridor of croup.
*Foreign Body aspiration*
- While foreign body aspiration can cause stridor, it is typically an **acute event** with a sudden onset of choking, coughing, and respiratory distress.
- There is no mention of a choking episode or sudden onset, and a low-grade fever is less typical for an uncomplicated foreign body aspiration.
Retropharyngeal Abscess Indian Medical PG Question 6: Which of the following statements about acute retropharyngeal abscess is true?
- A. Treatment often involves incision and drainage.
- B. Acute retropharyngeal abscess is common in adults.
- C. Swelling typically occurs unilaterally.
- D. Acute retropharyngeal abscess is often due to lymphadenitis. (Correct Answer)
Retropharyngeal Abscess Explanation: ***Acute retropharyngeal abscess is often due to lymphadenitis.***
- The **retropharyngeal lymph nodes** (nodes of Rouviere) are prominent in children and drain the nasopharynx, oropharynx, and paranasal sinuses. Infection in these areas can lead to **suppurative lymphadenitis**, which can then progress to an abscess.
- **Lymphadenitis** following an upper respiratory tract infection is the **most common etiology** in children, who represent the majority of cases. This is a characteristic pathophysiological mechanism specific to retropharyngeal abscesses.
- While other causes exist (trauma, foreign bodies, odontogenic infections in adults), this statement best captures the typical presentation and etiology.
*Acute retropharyngeal abscess is common in adults.*
- **Retropharyngeal abscesses** are far more common in **children**, especially those under 6 years of age, due to the presence of prominent retropharyngeal lymph nodes that typically atrophy by age 5-6.
- In adults, retropharyngeal abscesses are rarer and usually result from trauma, foreign bodies, or odontogenic infections rather than lymphadenitis.
*Swelling typically occurs unilaterally.*
- The **retropharyngeal space** is a **midline structure**, and infection typically causes **bilateral** or central swelling.
- **Edema and inflammation** affect the entire space, leading to generalized posterior pharyngeal wall bulging rather than true unilateral presentation.
- While some asymmetry may be visible, describing the swelling as "typically unilateral" is inaccurate.
*Treatment often involves incision and drainage.*
- While this statement is technically true for **mature abscesses**, it is **incomplete** as a characterizing statement about retropharyngeal abscesses.
- Treatment depends on stage: **early phlegmon or cellulitis** may respond to **intravenous antibiotics alone**, while a **mature abscess** requires both **I&D and antibiotics**.
- The statement lacks the important context that **antibiotics are the cornerstone** of treatment, with surgical drainage reserved for established abscesses.
- This is a treatment modality rather than a defining characteristic of the condition, making it a less complete answer than the etiology-based statement.
Retropharyngeal Abscess Indian Medical PG Question 7: 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:-
- A. Retropharyngeal abscess
- B. Parapharyngeal abscess
- C. Tonsillitis
- D. Quinsy (Correct Answer)
Retropharyngeal Abscess Explanation: ***Quinsy (Peritonsillar abscess)***
- **Quinsy** is a **peritonsillar abscess** that presents with fever, severe throat pain, and the pathognomonic sign of **unilateral tonsil pushed toward the midline**.
- The abscess forms in the **peritonsillar space** (between the tonsillar capsule and superior constrictor muscle), causing **medial displacement of the tonsil** and **bulging of the soft palate**.
- Patients typically have **trismus, dysphagia, "hot potato voice"** and may have visible neck swelling.
- This clinical presentation exactly matches the description: tonsil pushed to midline is the **classic finding for peritonsillar abscess**.
*Parapharyngeal abscess*
- A **parapharyngeal abscess** involves the deep parapharyngeal space lateral to the pharynx.
- While it can cause neck swelling and fever, it typically causes **fullness and induration of the lateral pharyngeal wall** rather than prominent medial displacement of the tonsil itself.
- The **tonsil is usually NOT pushed to the midline** in parapharyngeal abscess; instead, there is lateral pharyngeal wall bulging.
- Often presents with more prominent external neck swelling below the angle of mandible.
*Retropharyngeal abscess*
- A **retropharyngeal abscess** occurs in the retropharyngeal space behind the posterior pharyngeal wall.
- Presents with **posterior pharyngeal wall bulge**, neck stiffness, and dysphagia.
- Does **NOT cause medial displacement of the tonsil** as the abscess is posterior, not lateral to the tonsil.
*Tonsillitis*
- **Acute tonsillitis** causes bilateral tonsillar inflammation with erythema and exudates.
- While both tonsils may be enlarged, there is **no unilateral medial displacement** of one tonsil.
- Less likely to cause significant neck swelling compared to deep space infections.
Retropharyngeal Abscess Indian Medical PG Question 8: A 15 years old Male presented with history of fever since 2 days, unable to swallow the food with muffled voice. On examination it is noted right tonsil is shifted to midline. What is the diagnosis:
- A. Quincy (Correct Answer)
- B. Acute tonsillitis
- C. Parapharyngeal abscess
- D. Acute retropharyngeal abscess
Retropharyngeal Abscess Explanation: ***Quincy (Peritonsillar abscess)***
- This patient's presentation with **fever**, **dysphagia**, **muffled voice** (hot potato voice), and **tonsil shifted to the midline** is classic for a **peritonsillar abscess (Quincy)**.
- The affected tonsil is pushed **medially toward the midline** by the collection of pus between the tonsillar capsule and the superior constrictor muscle.
- The uvula is typically deviated to the **contralateral side**, and patients often have **trismus** and difficulty opening the mouth.
- This is the **most common deep neck space infection** and typically follows acute tonsillitis.
*Parapharyngeal abscess*
- A **parapharyngeal abscess** would present with **severe trismus**, **neck swelling**, **torticollis**, and **bulging of the lateral pharyngeal wall**.
- While it can push the tonsil medially, it more characteristically causes **anterolateral displacement** of the entire pharyngeal wall rather than isolated tonsillar displacement.
- Patients typically have more pronounced **systemic toxicity** and **neck involvement** than seen with peritonsillar abscess.
*Acute tonsillitis*
- **Acute tonsillitis** presents with **bilateral tonsillar enlargement**, exudates, and pharyngeal erythema.
- It does not cause **displacement of the tonsil to the midline** or significant **muffled voice**.
- While fever and dysphagia are present, the physical examination finding of tonsillar shift indicates a suppurative complication (abscess formation).
*Acute retropharyngeal abscess*
- An **acute retropharyngeal abscess** occurs in the retropharyngeal space behind the posterior pharyngeal wall.
- It presents with **neck stiffness**, **stridor**, **drooling**, **bulging of the posterior pharyngeal wall**, and **reluctance to extend the neck**.
- It would **not cause visible displacement of the tonsil to the midline** as the abscess is in a different anatomical space.
- More common in **young children** (under 5 years) than adolescents.
Retropharyngeal Abscess Indian Medical PG Question 9: Trismus in parapharyngeal abscess is caused by spasm of which of the following muscles?
- A. Temporalis
- B. Masseter
- C. Lateral pterygoid
- D. Medial pterygoid (Correct Answer)
Retropharyngeal Abscess Explanation: ***Medial pterygoid***
- The **medial pterygoid muscle** is intimately associated with the parapharyngeal space, and inflammation or infection in this area directly irritates it.
- Spasm of the **medial pterygoid** leads to the characteristic limited jaw opening, or **trismus**, seen in parapharyngeal abscess.
*Temporalis*
- While the **temporalis muscle** is also a muscle of mastication, it is less directly affected by a parapharyngeal abscess than the medial pterygoid.
- Its primary action is elevation and retraction of the mandible, and while its spasm can contribute to trismus, it's not the primary cause in this specific infection.
*Masseter*
- The **masseter muscle** primarily elevates the mandible, but it is located more superficially and laterally compared to the parapharyngeal space.
- Abscess in the parapharyngeal space is less likely to directly irritate the masseter compared to deeper muscles.
*Lateral pterygoid*
- The **lateral pterygoid muscle** is primarily responsible for jaw protrusion and depression.
- While it can contribute to trismus, its anatomical position makes it less prone to direct irritation and spasm from a parapharyngeal abscess compared to the medial pterygoid.
Retropharyngeal Abscess Indian Medical PG Question 10: Early tonsillectomy is not done in?
- A. Peritonsillar abscess
- B. Thyroid storm (Correct Answer)
- C. Rheumatic fever
- D. Suspected malignancy
Retropharyngeal Abscess Explanation: ***Thyroid storm***
- **Thyroid storm** is a life-threatening medical emergency caused by exaggerated hyperthyroidism, requiring immediate medical stabilization to control hormone levels and systemic effects.
- Early tonsillectomy is **contraindicated** in this scenario because it would add significant surgical stress and anesthetic risks to an already critically unstable patient.
*Peritonsillar abscess*
- A **quinsy tonsillectomy** (abscess tonsillectomy) is often performed acutely, especially if drainage is difficult or if it's the first episode, to resolve the abscess and remove the infected tissue.
- This procedure can be done in the acute phase of a peritonsillar abscess to relieve symptoms and reduce the risk of recurrence.
*Rheumatic fever*
- Patients with recurrent **acute tonsillitis** who are at risk of developing **rheumatic fever** are strong candidates for tonsillectomy to prevent further streptococcal infections and subsequent autoimmune complications.
- Tonsillectomy is considered a prophylactic intervention in cases of recurrent strep throat leading to rheumatic fever.
*Suspected malignancy*
- If tonsillar asymmetry or other signs raise suspicion of **tonsillar malignancy**, prompt tonsillectomy is often performed for **diagnostic biopsy** and initial tumor removal.
- Early surgical intervention is crucial for diagnosing and staging potential tonsil cancer, which can guide subsequent treatment.
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