22/08/2026
CO**HA BULLOSA — An Important Sinonasal Anatomical Variant
Co**ha bullosa refers to pneumatization (air filling) of the middle nasal turbinate. It is a relatively common anatomical variant and is best appreciated on coronal and axial CT of the paranasal sinuses.
🔍 What should we look for on CT?
• Air-filled expansion of the middle turbinate
• Assess its size and extent of pneumatization
• Check for narrowing of the middle meatus
• Evaluate its relationship with the ostiomeatal complex (OMC)
• Look for associated mucosal thickening or obstruction of adjacent sinus drainage pathways
⚠️ Clinical significance:
A small co**ha bullosa is often an incidental finding. However, a large or extensively pneumatized middle turbinate may contribute to narrowing of the nasal cavity or OMC and can be associated with impaired sinus drainage and recurrent sinonasal symptoms.
📚 Radiology Tip:
When reporting co**ha bullosa, don't simply mention its presence. Assess whether it causes significant narrowing or obstruction of adjacent drainage pathways and whether there are associated inflammatory changes.
🧠 Remember:
Co**ha bullosa = pneumatized middle turbinate — an anatomical variant that becomes clinically relevant mainly when it contributes to obstruction.
⚠️ Important Note for Radiology Professionals:
Interpret the finding in conjunction with the patient's clinical symptoms and the overall sinonasal anatomy. The mere presence of co**ha bullosa does not establish chronic rhinosinusitis or prove it is the cause of symptoms.
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