"grade I: erosion or destruction of the orbital medial wall"
"grade II: extraconal invasion of the periorbital fat tissue"
"grade III: invasion of the medial rectus muscle, optic nerve, ocular bulb, or skin overlying the eyelid"
"There is no universally accepted classification system (c.2021) for assessing orbital invasion by sinonasal tumours and other grading systems, including those proposed by McCary et al. and Neel et al. 2."
"There is no universally accepted classification system (c.2021) for assessing orbital invasion by sinonasal tumours and other grading systems, including those proposed by McCary et al. and Neel et al. 2."
"There is no universally accepted classification system (c.2021) for assessing orbital invasion by sinonasal tumours and other grading systems, including those proposed by McCary et al. and Neel et al. 2."