phy in the detection of apically infected cheek teeth.4,5 Referral for a CT exam may be required for a definitive diagnosis and/or surgical planning. The dorsal and VCSs are not readily isolated in standard digital radiographic examinations, but can be fully evaluated with CT using multiplanar recon- structions. Nasal conchal bulla empyema is a fairly common finding in horses with sinusitis.6 The ventral nasal conchal bulla is more commonly involved than the dorsal nasal conchal bulla. The dorsal nasal conchal bulla can be identified on the lateral view of the skull. There is superimposition of the right and left dorsal nasal bulla on the lateral view, but these structures are separated in the dor- sal 30° ventral lateral oblique view. The ventral
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nasal conchal bulla is difficult to identify in stan- dard radiographs.
Acknowledgments
Declaration of Ethics The Author has adhered to the Principles of Veter- inary Medical Ethics of the AVMA.
Conflict of Interest The Author has no conflicts of interest.
References and Footnotes
1. Baratt R. Advances in equine dental radiology. Vet Clin North Am Equine Pract 2013;29:367–395, vi.
