Fig. 4
From: Hemangiopericytoma/solitary fibrous tumor of the cranial base: a case series and literature review
Exposure and protection of ICA in endoscopic endonasal surgery. a Reveal the contents of the PF. b, c Removal of the ET and preservation of the EVP. d–g Removal of lesions around ICA, free ICA. h Fill in autologous fat. i Reconstruction of cranial base with LNF. SS, sphenoid sinus; PS: pterygoid process; IA: infraorbital artery; MA: maxillary artery; PF: pterygopalatine fossa; ET: eustachian tube; EVP: evator veli palatine; IPS: inferior petrosal sinus; ICA: internal carotid artery; PD: petrous drum; LNF: lateral nasal flap