This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tumors of Nose and PNS, Subject name: ENT
[{'content': 'Juvenile angiofibroma confined to nasal cavity, preferred approach for surgery - \nSelect and explain. \nA. Transnasal endoscopic, B. Transpalatal, C. Lateral rhinotomy, D. Transmaxillary', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Transnasal endoscopic Staging of juvenile nasopharyngeal aniofibroma (Modified sessions, et al)IA:Limited to nose and/or nasopharyngeal vaultIB :Extension into > 1 sinus11 A:Minimal extension into PMFII B:Full occupation of PMF with or without erosion of orbital bonesIIC:ITF with or without cheek or posterior to pterygoid platesIII A:Erosion of skull base-minimal intracranialIII B:Erosion of skull base-extensive intracranial with or without cavernous sinus Proposed staging and surgical protocol for JNAModified sessionsSurgical approachIA, IB, IIAEndoscopic transnasalIIBExcision via lateral rhinotomyIICExcision via Weber-FergussonIII AExcision via Weber-Fergusson and its extensions/maxillary swing/craniotomyIIIBRadiotherapy (IMRT)", 'role': 'assistant'}]