Abstract
Congenital extrahepatic portosystemic shunt (CEPS), also known as Abernethy malformation, is a rare condition in which the splenomesenteric blood drains directly into a systemic vein, bypassing the liver through a complete or partial shunt. The diagnosis is frequently made during childhood in the setting of neonatal cholestasis, hypergalactosemia, failure to thrive, mental retardation or other congenital defects. In adulthood, CEPS is usually found incidentally during diagnostic work-up for abdominal pain, liver test abnormalities, liver nodules, portopulmonary hypertension, portopulmonary syndrome or portosystemic encephalopathy. The diagnosis depends on imaging and portal venography, but sometimes only liver biopsy can be resolutive, demonstrating the absence of venules within the portal areas. Here we report four recent cases of Abernethy malformation diagnosed in young adults, in which ultrasound (US) was the initial imaging technique and allowed to suspect the diagnosis. Furthermore, we reviewed clinical presentations, associated anomalies and treatment of the 310 cases of CEPS previously reported in the literature.
Sommario
Lo shunt portosistemico extraepatico congenito (CEPS), anche noto come malformazione di Abernethy, è una rara condizione patologica in cui il sangue venoso refluo dal distretto spleno-mesenterico drena direttamente nel circolo venoso sistemico, bypassando il fegato attraverso un shunt completo o parziale. La diagnosi viene posta frequentemente durante l’infanzia in presenza di colestasi neonatale, ipergalattosemia, scarso accrescimento o altri difetti congeniti. Durante l’età adulta la diagnosi di CEPS è spesso incidentale nel corso di accertamenti diagnostici per dolore addominale, alterazioni degli indici di funzionalità epatica, riscontro di lesioni focali epatiche, ipertensione porto-polmonare, sindrome porto-polmonare ed encefalopatia porto-sistemica. Le tecniche di imaging o la porto-venografia consentono solitamente di porre la diagnosi, ma in alcuni casi solo la biopsia epatica risulta dirimente, documentando l’assenza di strutture venose a livello degli spazi portali. Nel presente lavoro vengono presentati 4 casi di malformazione di Abernethy diagnosticati in giovani adulti, nei quali l’ultrasonografia (US) è stata la prima tecnica di immagine utilizzata consentendo di porre il sospetto diagnostico. Inoltre, abbiamo analizzato la presentazione clinica, le anomalie associate e le opzioni terapeutiche dei 310 casi di CEPS riportati in letteratura.
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Ponziani, F.R., Faccia, M., Zocco, M.A. et al. Congenital extrahepatic portosystemic shunt: description of four cases and review of the literature. J Ultrasound 22, 349–358 (2019). https://doi.org/10.1007/s40477-018-0329-y
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DOI: https://doi.org/10.1007/s40477-018-0329-y