Meghana Akula1 , Krishnadivya Poruri2
BACKGROUND A wide variety of non-neoplastic lesions can occur in the posterior cranial fossa. Most of them are asymptomatic and incidentally detected. They may become symptomatic either because of pressure, rupture, or secondary inflammation. We wanted to study the spectrum of non-neoplastic lesions in posterior cranial fossa among intracranial lesions. METHODS This was a combined retrospective and prospective study, done from January 2009 to May 2014. 32 cases of non-neoplastic lesions in posterior cranial fossa were studied for patient demographics and histopathology. RESULTS The patients’ age ranged from one to eighty years and the male to female ratio was 1.2 : 1. Among non-neoplastic lesions, majority were epidermoid cysts i.e. 34.3 % followed by cerebellar abscess 28.1 %, arachnoid cyst 15.6 % and others. Maximum number of cases was in the third and fourth decades. Tuberculous lesions accounted for 12.5 % cases. CONCLUSIONS Non-neoplastic lesions have a wide spectrum of histopathology and histogenesis. Among the non-neoplastic lesions, the most common lesion was epidermoid cyst followed by cerebellar abscess. The peak age incidence was in 3 rd and 4 th decades with male preponderance.
