Can A Cyst In Sinus Cavity Cause Severe Headaches And Memory Loss?

22 y/o with recurrent n/v for over a year, mod to severe headaches, had a thirty hour episode of severe loc change (could not remember that she had a six month old son, much less where he was), memory loss (does not remember anything from that time). CT with and without contrast negative. MRI negative, sinus cavity cyst was noted. tox screen negative. labs normal. Put out over 4 L urine in five hour period. My first question is according to the nurse, there is no test for K2, as they think she may have ingested something (online there are plenty of tests). Deep questioning of friends/boyfriend all members close to her swear she takes nothing and never has. Are all tox screens the same? Is K2 a regular test on a tox screen? Secondly, could a cyst in the sinus cavity be causing any of these affects?