Brain fungus or temporal meningoencephalocele is a rare condition in otology. It results due to the defect in tegmen tympani or tegmen antri formed most commonly after mastoidectomy. As it could be a harbinger to serious complications like meningitis, hence it needs a prompt diagnosis and an urgent surgical intervention. we present a case of 27-year-old lady with a 2.4×1.2 cm sized defect in the tegmen tympani formed as a result of modified radical mastoidectomy which was managed surgically via trans mastoid approach and a complete closure was confirmed by HRCT scan after 6 months of surgery. we concluded the importance of early diagnosis and management of this disease along with a special emphasis over the surgical lessons learnt from our experience in this case.