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Sphenochoanal polyps: evaluation with CT and MR imaging
J L Weissman1, E K Tabor, H D Curtin
1Department of Radiology, University of Pittsburgh School of Medicine, Eye and Ear Hospital, PA 15213.
Radiology
|January 1, 1991
Summary
Sphenochoanal polyps originate in the sphenoid sinus, while antrochoanal polyps arise from the maxillary antrum. Advanced imaging like CT and MRI help differentiate these nasal polyps for appropriate surgical planning.
Area of Science:
- Otolaryngology
- Radiology
- Pathology
Background:
- Choanal polyps are benign inflammatory masses in the nasal cavity.
- Distinguishing the sinus of origin is critical for surgical management.
- Sphenochoanal and antrochoanal polyps represent distinct anatomical origins.
Observation:
- Sphenochoanal polyps originate from the sphenoid sinus and extend into the choana.
- Antrochoanal polyps typically arise from the maxillary sinus and extend into the nasal cavity and choana.
- Computed tomography (CT) scans show sphenochoanal polyps as low-attenuation masses.
Findings:
- Contiguous axial or coronal CT and MRI scans effectively differentiate sphenochoanal from antrochoanal polyps.
- The anatomical location and pathway of extension are key differentiating features.
- Accurate identification of the sinus of origin impacts surgical approach.
Implications:
- Precise diagnosis of polyp origin ensures optimal surgical intervention.
- Understanding imaging characteristics aids in differentiating rare sphenochoanal from common antrochoanal polyps.
- This distinction is crucial for effective treatment planning in sinonasal pathology.