Infratentorial hygroma secondary to decompressive craniectomy after cerebellar infarction
Other Titles: 
Higroma infratentorial secundario a una craniectomía descompresiva tras un infarto de cerebelo
Central vertigo
Infratentorial hygroma
Posterior fossa decompression
Issue Date: 
Sociedad Española de Neurocirugía
Tejada-Solis S, Diez-Valle R, Dominguez-Echavarri PD, Garcia de Eulate-Ruiz MR, Gomez-Ibanez A. Infratentorial hygroma secondary to decompressive craniectomy after cerebellar infarction. Neurocirugia (Astur) 2009 Oct;20(5):470-473.
We present a case of expansive CSF collection in the cerebellar convexity. The patient was a 74 years old lady who one month before had suffered a cerebellar infarct complicated with acute hydrocephalus. She had good evolution after decompressive craniectomy without shunting. Fifteen days after surgery, the patient started with new positional vertigo, nausea and vomiting and a wound CSF fistula that needed ventriculoperitoneal shunt (medium pressure) because conservative treatment failed. After shunting, the fistula closed, but the patient symptoms worsened. The MRI showed normal ventricular size with a cerebellar hygroma, extending to the posterior interhemispheric fissure. The collection had no blood signal and expanded during observation. A catheter was implanted in the collection and connected to the shunt. The patient became asymptomatic after surgery, and the hygromas had disappeared in control CT at one month. This case shows an infrequent problem of CSF circulation at posterior fossa that resulted in vertigo of central origin. A higroma-ventricle-peritoneal shunt solved the symptoms of the patient.

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