The study is retrospective. The research group consists of 410 patients: 200 with peritentorial hematoma and respectively randomised group of 210 patients, treated in the Department of Neurosurgery and Neurotraumatology in Krakow from 2003 to 2008. The relation between peritentorial hematoma, clinical characteristic of the group, radiological images and the early and the late outcome was analyzed. Peritentorial hematoma was diagnosed in 7,77% of the patients after brain injury, predominantly in elder males. The clinical state of the patients with peritentorial hematoma evaluated by GOS is more severe, CT images show more common tSAH, subdural hematoma, diffuse axonal injury and subtentorial pathology, direct and indirect symptoms of brain stem injury, diffuse brain injury type III and non-operated intracranial mass according to TCDB scale and with massive focal and diffuse changes according to Wardlow classification. The outcome evaluation showed higher mortality in the early and late period. Significant statistical differences against the group with peritentorial hematoma were showed in GOS, GOSE, MMSE and NPI. Statistical analysis both mono- and multidimensional models of logistic regression points that peritentorial hematoma is a radiological prognostic factor in treatment of the patients after traumatic brain injury.