[Hematoma of the cerebral peduncle].

The paper presents a rare case of surgical treatment for hematoma of the cerebral peduncle in a 30-year-old woman found to have progressive neurological focal disorders due to mesaticephalic and thalamic lesions. Computed tomography and magnetic resonance imaging (MRI) revealed a round mass (26 x 3 x 25 mm) in the left cerebral peduncle and thalamus without surrounding edema. The focus showed characteristic signs of subacute parenchymatous hematoma. The interpeduncular cistern was explored via transsylvian approach and hematoma was removed by making a small incision of the left cerebral peduncle. Histological examination of a surgical specimen demonstrated no vascular malformation. The postoperative period was complicated by left oculomotor nerve palsy which regressed following several months. A small slit-like cyst communicating with the interpeduncular cistern was detected in the left cerebral peduncle by MRI at follow-up.