ENT Rhinology and Sinonasal Disorders 1 — Questions and Answers
Question 1: According to the EPOS guidelines, chronic rhinosinusitis (CRS) is defined as inflammation of the nose and paranasal sinuses lasting at least how long?
- 4 weeks
- 8 weeks
- 12 weeks (Correct answer)
- 6 months
Correct answer: 12 weeks
EPOS defines CRS as sinonasal inflammation persisting for 12 weeks or longer despite treatment attempts.
Question 2: Which of the following is the most common causative organism in acute bacterial rhinosinusitis?
- Staphylococcus aureus
- Streptococcus pneumoniae (Correct answer)
- Pseudomonas aeruginosa
- Haemophilus influenzae type b
Correct answer: Streptococcus pneumoniae
Streptococcus pneumoniae is the most common bacterial pathogen in acute bacterial rhinosinusitis, followed by Haemophilus influenzae.
Question 3: Samter's triad (Aspirin-Exacerbated Respiratory Disease) consists of which combination?
- Asthma, chronic sinusitis, and allergic rhinitis
- Asthma, nasal polyposis, and NSAID sensitivity (Correct answer)
- Nasal polyposis, deviated septum, and asthma
- Allergic rhinitis, nasal polyposis, and food allergy
Correct answer: Asthma, nasal polyposis, and NSAID sensitivity
Samter's triad comprises asthma, nasal polyposis, and sensitivity to aspirin/NSAIDs, driven by arachidonic acid pathway dysregulation.
Question 4: The ostiomeatal complex (OMC) is clinically important in rhinosinusitis because it serves as the drainage pathway for which group of sinuses?
- Sphenoid and posterior ethmoid sinuses
- Frontal, maxillary, and anterior ethmoid sinuses (Correct answer)
- Maxillary and sphenoid sinuses only
- All paranasal sinuses equally
Correct answer: Frontal, maxillary, and anterior ethmoid sinuses
The OMC is the final common drainage pathway for the frontal, maxillary, and anterior ethmoid sinuses; obstruction at this point predisposes to sinusitis in these regions.
Question 5: Which imaging modality is considered the gold standard for evaluating sinonasal anatomy before functional endoscopic sinus surgery (FESS)?
- Plain X-ray of the sinuses
- MRI with gadolinium contrast
- Non-contrast CT of the paranasal sinuses (Correct answer)
- Cone-beam CT with contrast
Correct answer: Non-contrast CT of the paranasal sinuses
Non-contrast CT of the paranasal sinuses provides the bony detail and anatomic roadmap essential for safe FESS planning.
Question 6: First-line management for anterior epistaxis unresponsive to direct pressure involves which intervention?
- Posterior nasal packing
- Endoscopic sphenopalatine artery ligation
- Chemical cautery with silver nitrate (Correct answer)
- Embolization of the internal maxillary artery
Correct answer: Chemical cautery with silver nitrate
Chemical cautery with silver nitrate is the first-line office-based procedure for anterior epistaxis at Kiesselbach's plexus after direct pressure fails.
Question 7: Nasal polyposis is most strongly associated with which underlying condition?
- Deviated nasal septum
- Type 2 eosinophilic inflammation (Correct answer)
- Bacterial biofilm formation
- Autonomic dysfunction of nasal mucosa
Correct answer: Type 2 eosinophilic inflammation
Nasal polyps arise predominantly from type 2 (Th2-mediated) eosinophilic inflammation, as evidenced by high tissue eosinophil and IL-5 levels.
ENT Rhinology and Sinonasal Disorders 1
According to the EPOS guidelines, chronic rhinosinusitis (CRS) is defined as inflammation of the nose and paranasal sinuses lasting at least how long?