[A case of cerebellar variant of posterior reversible encephalopathy syndrome in puerperium].

A 29-year-old woman complained of headache and nausea several hours after delivery, followed by mild disturbance of consciousness. Physical examination revealed hypertension, systemic edema, nystagmus, dysarthria, and cerebellar ataxia. Computed tomography showed low attenuation areas in the cerebellum, and MR imaging revealed vasogenic edema in the cerebellum. MR angiography and MR venography demonstrated no significant abnormalities. We diagnosed a cerebellar variant of posterior reversible encephalopathy syndrome(PRES), and treated the patient immediately with antihypertensive drug and diuretic. The symptoms dramatically improved and MR imaging ten days after admission revealed disappearance of the vasogenic edema in the cerebellum. She was discharged without any sequelae. Though a cerebellar variant of PRES is very rare, rapid diagnosis and treatment is important for good prognosis when the disease is encountered.