No shinkei geka. Neurological surgery
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We report a case in which a large abdominal pseudocyst developed following a ventriculo-peritoneal shunt (V-P shunt) for hydrocephalus due to pineal germinoma. A 24-year-old man had undergone a V-P shunt and radiotheraphy for unbiopsied posterior third ventricle tumor. ⋯ The shunt tube was clearly deomonstrated in the cavity by computed tomography. It is suggested that, in a patient suspicious of having abdominal pseudocyst who developed abdominal symptoms and signs following V-P shunt, abdominal computed tomography and/or ultrasonotomography provide a definitive diagnosis of this entity.