Brain herniations predominantly result from increased intracranial pressures due to various etiologies and are usually acute. Chronic medial temporal lobe [uncal and parahippocampal] herniation has been rarely reported in literature. Unilateral and bilateral idiopathic temporal lobe [uncal and parahippocampal] herniations have been even more rarely reported. It's important to diagnose idiopathic temporal lobe herniations, as these are "do not touch" lesions. In this paper we presented two cases

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... with nonemergent medial temporal lobe herniations. Standard MRI of the brain was performed in a 3T Siemens magnet with a standard head coil, to make the diagnosis. First patient is a 40 year-old female with a longstanding history of headaches and bilateral idiopathic uncal herniations. Second patient is a 21-year old female with shunt revisions for hydrocephalus since a young age. She had unilateral right uncal and parahippocampal herniation, and an ipsilateral dural based right frontal calcified small mass without significant mass effect on the nearby structures.