Question

A 45-year-old male presents with breathlessness and undergoes a CT scan of the paranasal sinuses (PNS). Which sinus is obstructed?

• A. Maxillary
• B. Frontal
• C. Sphenoid
• D. Ethmoid

Hint:

Maxillary sinus obstruction is commonly associated with sinusitis and can cause symptoms like facial pain, nasal congestion, and difficulty breathing.

Answer 1

The Correct Option is A

The problem requires identifying which sinus is likely to be obstructed in a 45-year-old male presenting with breathlessness. The options to consider are Maxillary, Frontal, Sphenoid, and Ethmoid sinuses. Each sinus is part of the paranasal sinus system with distinct anatomical locations and drainage paths.

Analysis:

• Maxillary Sinus: Located in the cheek area, the maxillary sinuses are prone to obstruction due to their drainage into the middle meatus of the nasal cavity which is often blocked by inflammation or mucus.
• Frontal Sinus: Located in the forehead, these drain via the frontonasal duct and are not primary candidates for general breathlessness.
• Sphenoid Sinus: Found deeper in the skull, they can cause deep headache when obstructed but not typically breathlessness.
• Ethmoid Sinus: Located between the eyes, blockage here can cause nasal obstruction and general discomfort but is less directly associated with breathlessness.

Conclusion: The Maxillary Sinus is most prone to obstruction that impacts the airway, leading to symptoms like breathlessness. Therefore, the indicated sinus obstruction is most likely the Maxillary sinus.