A Case of Reversible Porencephalic Cyst during Malfunction of VP Shunt

Autor: Kazuhiko Nakata, Kiyotaka Ueda, Masahiro Fukami, Hideki Shindoh, Masao Motomochi, Shintaku Minami
Rok vydání: 1990
Předmět:
Zdroj: Annual Review of Hydrocephalus ISBN: 9783662111543
DOI: 10.1007/978-3-662-11152-9_58
Popis: The authors reported an interesting case of reversible porencephalic cyst, which was recognized only during malfunction of a VP-shunt for hydrocephalus which had developed since intracranial hemorrhage. This female infant was born in a full-term normal delivery from a 34-year-old primipara, gravida 1. Her birth-weight was 2,200 gram. Her Apgar score was 5 at birth and became 7 in 11 minutes. Around 4 days after birth, she became febrile and unconscious with respiratory distress. A CT scan taken on the 6th day after birth revealed bilateral intraventricular and subarachnoid hemorrhage. Three weeks after birth, a left VP-shunt was placed for the treatment of progressive internal hydrocephalus with periventricular lucency shown in serial CTs. Postoperative course was uneventful until age 9 months, when she developed repeated vomiting and irritability. The shunt was malfunctioning, and the CT (Figure) showed a porencephalic cyst along the shunt catheter. The shunt revision resulted in prompt clinical recovery and disappearance of the porencephalic cyst as well. She has been well since then with good development both mentally and physically for a four and a half year’s follow-up. The porencephalic cyst in this case was unique in respect to its reversibility and its temporary presence only during malfunctioning of shunting system. The cyst is considered to be due to CSF collection secondary to the one-way flow of CSF to the comparatively weakened white matter. The CSF must have entered through the ependymal defect at the site of ventricular penetration of the catheter. The authors propose a new clinical entity of reversible porencephalic cyst, which should be differentiated from so-called porencephalic cyst with parenchymal defect.
Databáze: OpenAIRE