Significance of the simultaneous combined transcranial and endoscopic endonasal approach for prevention of postoperative CSF leak after surgery for lateral skull base meningioma.

Lateral skull base meningiomas, particularly sphenoorbital meningiomas, sometimes extend extremely widely into adjacent structures including the paranasal sinuses. For endonasal skull base reconstruction using a vascularized nasoseptal flap for prevention of postoperative cerebrospinal fluid (CSF) leak, the simultaneous combined transcranial and endoscopic endonasal approach was applied for resection of these extensive tumors. We performed a retrospective review of four patients treated with the simultaneous combined transcranial and endoscopic endonasal approach for resection of lateral skull base meningiomas. Preoperative characteristics, tumor extent, extent of resection, complications, and postoperative outcomes were analyzed. The tumor extended into the paranasal sinus, infratemporal fossa, and pterygopalatine fossa in all patients. Extracranial extension into the cavernous sinus or superior orbital fissure was detected in two and three patients, respectively. In one patient without extension into the cavernous sinus and superior orbital fissure, gross total resection was achieved, whereas in the other three patients, subtotal resection was performed, and small residual masses of the tumor remained in the cavernous sinus or superior orbital fissure to minimize the risk of postoperative ocular nerve damage. No patients experienced postoperative CSF leak. The simultaneous combined transcranial and endoscopic endonasal approach is useful for a subgroup of patients with lateral skull base meningiomas for prevention of postoperative CSF leak. Particularly in recurrent cases in which vascularized flaps from the transcranial side are likely unavailable due to prior tumor resection, this combined approach is worth considering depending on tumor extension into the paranasal sinus.

Matsuda M ，Akutsu H ，Tanaka S ，Ishikawa E ... -  《-》

Combined cranionasal surgery for spheno-orbital meningiomas invading the paranasal sinuses, pterygopalatine, and infratemporal fossa.

To evaluate the efficacy of combining an endonasal endoscopic skull-base approach and repair with a transcranial orbitozygomatic approach for spheno-orbital meningiomas (SOMs). Three patients with recurrent SOMs underwent combined orbitozygomatic and endonasal endoscopic surgery. In 2 patients both procedures were done in 1 operation and in 1 patient the endonasal surgery was done 2.5 months after the craniotomy. Extent of resection, complications, morbidity, and mortality were evaluated. Gross total resection was achieved in 1 patient and near total resection in the other 2 patients with tumor left in the cavernous sinus and parapharyngeal space. Two patients suffered cranial neuropathy from the transcranial surgery and the other developed a pseudomeningocele. There were no complications from the endonasal surgery. Patients having combined single setting cranionasal surgery were discharged on day 6 and 8, whereas the patient having only the endonasal component on a later date was discharged on day 2. A combined cranionasal approach involving transcranial orbitozygomatic and endonasal endoscopic approaches is an effective 2-stage surgery for resecting SOMs invading into the sinuses and paranasal compartments. The ability to perform a multilayer closure involving a vascularized nasoseptal flap additionally decreases the risk of postoperative cerebrospinal fluid leak.

Attia M ，Patel KS ，Kandasamy J ，Stieg PE ，Spinelli HM ，Riina HA ，Anand VK ，Schwartz TH ... -  《-》

Combined simultaneous transcranial and endoscopic endonasal resection of sphenoorbital meningioma extending into the sphenoid sinus, pterygopalatine fossa, and infratemporal fossa.

Matsuda M ，Akutsu H ，Tanaka S ，Matsumura A ... -  《-》

Endoscopic Endonasal Craniofacial Surgery for Recurrent Skull Base Meningiomas Involving the Pterygopalatine Fossa, the Infratemporal Fossa, the Orbit, and the Paranasal Sinus.

Skull base meningiomas carry a nonnegligible risk of recurrence. In particular, those arising from the sphenoid wings or middle cranial fossa penetrate into extracranial regions, uncommonly showing massive expansion into the craniofacial regions on recurrence. The role of endoscopic endonasal surgery for those intractable lesions remains unclear. We performed endoscopic endonasal craniofacial surgery for 8 recurrent meningiomas invading into the pterygopalatine fossa, infratemporal fossa, nasopharynx, paranasal sinus, or orbit, comprising 2 meningothelial and 1 fibrous meningiomas (World Health Organization [WHO] grade I), 3 atypical and 1 clear cell meningiomas (grade II), and 1 anaplastic meningioma (grade III). All were large (15-80 cm3; median, 45 cm3) and highly vascularized. All 8 tumors were sufficiently resected. Gross total resection of the craniofacial part of the lesions was achieved in 5 patients (62.5%). In 3 patients with WHO grade I meningiomas and 1 with grade II, tumors were successfully controlled as of the last follow-up. In 4 patients with WHO grade II or III meningiomas, craniofacial lesions were controlled, whereas original intracranial lesions were poorly controlled and became critical. We consider the endoscopic endonasal approach as an acceptable, less-invasive alternative for recurrent craniofacial meningioma. Although all these cases were relatively large and highly vascularized, preoperative endovascular embolization of the feeding arteries contributes to significantly reducing vascularity of the tumors, and local control of the craniofacial lesions was successfully achieved in all cases. Endoscopic endonasal craniofacial surgery enabled sufficient mass reduction without disfiguring facial incisions.

Shin M ，Shojima M ，Kondo K ，Hasegawa H ，Hanakita S ，Ito A ，Kin T ，Saito N ... -  《-》

Endoscopic endonasal resection of anterior cranial base meningiomas.

Gardner PA ，Kassam AB ，Thomas A ，Snyderman CH ，Carrau RL ，Mintz AH ，Prevedello DM ... -  《-》