The ostiomeatal complex (or unit), sometimes less correctly spelled as osteomeatal complex, is a common channel that links the frontal sinus, anterior and middle ethmoid sinuses and the maxillary sinus to the middle meatus that allows air flow and mucociliary drainage. http://radiopaedia.org/articles/ostiomeatal-complex
For masses in the spinal canal it is critical to determine location; extrathecal, intramedullary or intrathecal extramedullary. Contour of the theca and cord are the two things to assess. Once you know where it is located then the differential.
The Rainbow - Targets Butt Works your butt and legs. Start on hands and knees, with hands under shoulders and knees under hips. Extend right leg out to right side as straight as possible with toe pointed and touching ground (A). In one fluid motion, move