1) The document discusses the surgical approach and procedure for cortical mastoidectomy. Key steps include raising skin and periosteal flaps, drilling along anatomical landmarks like the sigmoid sinus and facial nerve to identify structures, and widening the aditus and performing a posterior tympanotomy to access the mesotympanum. 2) Post-operative care involves drain removal within 48 hours and dry dressing of the ear. Potential complications discussed are persistent deafness, facial nerve injury, CSF leak, hemorrhage and infection. 3) The patient is advised restricted activity for 3 weeks followed by a gradual return to normal activity over 4 weeks, and to keep the operation site dry.