Background: Cholesteatoma is defined as erosive process, eroding ossicular chain, scutum, otic-capsule, fallopian canal and tegmun. Surgical management of cholesteatoma includes mastoidectomy. The aim of the study was to focuss on MRM: indications and outcomes of procedure. Methods: This study aims at knowing the indications and outcome of MRM after 1 year in terms of success rate, efficacy and patient’s satisfaction. It involves study over 42 patients who underwent surgery and were followed over a period of one year post surgery. Results: After 1 year of MRM 64.27% showed hearing improvement, 95.2% had dry and settled cavity, and there was no post-operative facial palsy, and SNHL. Conclusions: MRM is a procedure of choice for COM with extensive disease of mastoid. A meticulous and skilled MRM gives a well fashioned mastoid cavity with minimum or no recurrence/post-operative complications with a satisfactory hearing outcome.