Since he has a unilateral (one sided) irregular ethmoid mass, he should undergo a CT PNS with contrast, even if there are few symptoms at present. Low intensity on T1 ans T2 probably signifies a solid / fibrotic mass. It may be benign sinonasal polyposis or fungal disease. A small lesion, even if it turns out to be a tumor
, such as an inverted papilloma
, carcinoma or sarcoma
, can be treated effectively. CT will show the condition of the surrounding bone, which is not visible on MRI. The posterior ethmoid sinus
cells are closely related to the optic nerve
. You may upload the MRI, planned CT images including the one on your phone onto a free file sharing site such as www.filesanywhere.com and submit a link here.