Hi @kathyheidt and welcome. As other patients read these pages (and they often do) you will find others with maxillary sinus SSC and what they have gone through or are going through. Further, you can go to the search bar at the top of the page and type in Maxillary Sinus Cancer and you will see several previous discussions that you can read and/or follow.
I personally have not had Maxillary SSC but have had experience in SSC treatment and follow up when things didn't go quite as planned. Either way, there is help here but be patient with patients as not everyone reads these feeds all the time. This is a good place to start.
In the meantime, where in treatment are you or not started yet? Do you have some specific issues you need help with?