All the variations of sinonasal anatomy described in literature except the presence of supreme turbinate
were encountered in our study.
In addition, there were one each of the following; pneumatized supreme turbinate
, pneumatized crystagalli, dehiscent roof of frontal sinus, rudimentary right maxillary sinus, absent inter sphenoid septum, pneumatized septum and rudimentary frontal sinus.
Most nasal passages have three turbinates: inferior, middle, and superior; when a fourth is present, it is located above the superior turbinate, and it is called the supreme turbinate
. (1,2) The middle and superior turbinates are extensions of the ethmoid bone, whereas the inferior turbinate is an independent bony structure.
Supreme Turbinate: We could not discern the presence of supreme turbinate in any of our cases.
CONCLUSION: All the variations of sinonasal anatomy described in literature except the presence of supreme turbinate were encountered in our study.
(1) If a supreme turbinate
is present, the ostium may be found in the supreme meatus.
Following complete removal of the polyps, the superior turbinate was well visualized; a supreme turbinate and supreme meatus were seen posterior to the superior turbinate (figure, C).
In some cases, a supreme turbinate is also present.