My husband has recently been exposed to Carbon Monoxide poisoning and has had an Mri which is showing a mild degree of cortical atrophy as well as  a Lateral ethmoid air cell and sphenoid sinus and maxillary sinus mucosal thickening is present favoring sinonasal mucosal disease. It states that flow voids are present withhin central bilateral anterior and vertebrobasilair systems, is this cancerous?
Hicarbon monoxide poisoning is not necessarily cancerous, unless chronic. Onle few case reports are known. Mucosal damage can repair itself cerebral atrophy can be even age related suggest meet your Chat Doctor.