Crido Silvina,  Bravo Monica,  Lipsich Jose,  Cermeño Claudia,  Dardanelli Esteban,  Moguillanky Slvia

Final Pr. ID: Poster #: EDU-029

To present a series of patients with pylephlebitis without a significant past medical history Read More

Authors:  Crido Silvina , Bravo Monica , Lipsich Jose , Cermeño Claudia , Dardanelli Esteban , Moguillanky Slvia

Keywords:  Pylephlebitis, portal vein thrombosis, omphalitis, appendicitis, ultrasonography

Khan Hasan,  Hernandez Alberto,  Chau Alex,  Akhtar Zahra,  Upton Ashley

Final Pr. ID: Poster #: SCI-027

This study aims to evaluate the efficacy and impact of portal vein interventions in pediatric patients; which includes recanalization with venoplasty or stenting and their effects on hepatic and splenic hemodynamics through pre- and post-procedural liver and spleen elastography. Read More

Authors:  Khan Hasan , Hernandez Alberto , Chau Alex , Akhtar Zahra , Upton Ashley

Keywords:  Elastography, Portal Hypertension, Portal Vein Thrombosis

Arenos-abril Jesus,  Moreira Maricela,  Barnes Navarro Daniel,  Padros Fornieles Cristina,  Molino Gahete Jose Andres,  Riaza Lucía

Final Pr. ID: Poster #: EDU-047

Cavernous transformation of the portal vein (CTPV) is characterized by the formation of venous channels within and around a previously stenosed or occluded portal vein, serving as portoportal collateral vessels. It is a major cause of portal hypertension in children and requires a multifaceted management approach, including medical therapy, interventional procedures such as portal recanalization, and surgical treatments ranging from shunt creation to liver transplantation in end-stage cases.
CT-angiography, in combination with portal venography, is the key imaging modality for determining the optimal treatment strategy. It is essential not only for assessing liver cirrhosis and secondary signs of portal hypertension—such as portosystemic collaterals, splenomegaly, and ascites—but also for providing detailed anatomical mapping critical for surgical planning.
This presentation will illustrate various pediatric cases of CTPV and discuss the optimal management approach based on factors including the presence or absence of liver cirrhosis, dominant portal collaterals, intrahepatic portal flow, proper superior mesenteric vein communicating with the porta hepatis, and splenorenal shunts, among others. For each scenario a therapeutic plan will be suggested based upon clinical and imaging criteria.
By the end of this presentation, readers will be able to: Optimize CT protocols for evaluating CTPV; enhance reporting using a structured checklist of key findings; and support clinical decision-making in collaboration with multidisciplinary teams. Read More

Authors:  Arenos-abril Jesus , Moreira Maricela , Barnes Navarro Daniel , Padros Fornieles Cristina , Molino Gahete Jose Andres , Riaza Lucía

Keywords:  Liver, Portal Vein Thrombosis, Portal Hypertension

Stein Nina,  Ahmed Fahran

Final Pr. ID: Poster #: CR-066

We present a radiologic case of a teenager with portal, inferior mesenteric, superior mesenteric, and splenic vein thromboses presenting with acute abdominal pain and treated conservatively with anticoagulation therapy. Ultrasound and computed tomography were done at the acute presentation and follow up magnetic resonance images were performed. One year of anticoagulation therapy correlated with almost complete resolution of splanchnic thrombosis; however, the superior mesenteric vein continues to remain severely dilated close to the confluence on subsequent annual imaging. The initial imaging also diagnosed multiple phlebolith in the pelvis. We suspect this is a congenital malformation of the porto-splanchnic circulation presenting with acute thrombosis. Differential is variceal dilatation as sequela of extensive thrombosis. Read More

Authors:  Stein Nina , Ahmed Fahran

Keywords:  Splanchnic Venous Thrombosis, Portal Venous Aneurysm, Mesenteric Vein Thrombosis, Portal Vein Thrombosis, Anticoagulation

Cregg Allison,  Nguyen Theo,  Holm Tara,  Flanagan Siobhan

Final Pr. ID: Poster #: CR-059

Portal hypertension in pediatric patients is rare, most commonly caused by extrahepatic portal vein (PV) occlusion. Complications include gastrointestinal bleeding. If obstruction recanalization or surgical shunt is not feasible, a transjugular intrahepatic portosystemic shunt (TIPS) can be placed. Risks of TIPS include encephalopathy, shunt stenosis, or thrombosis. Tipsitis is rare, occurring in less than 1% of TIPS patients, but is serious, with a mortality of 32%. Early diagnosis and treatment are key to preventing the need for liver transplantation, and imaging plays a key role in early detection. We present a case of tipsitis identified with FDG-PET/CT imaging.
A 16 year-old-male with prematurity, umbilical vein catheter, and heterozygous prothrombin mutation presented with hematemesis. Imaging identified chronic PV thrombosis. Due to the occlusion involving both the right and left PV, TIPS was placed. 5.5 months post-TIPS, he presented with fever and body aches. Investigations revealed Methicillin-Sensitive Staphylococcus aureus (MSSA) bacteremia and thrombosed TIPS. He completed a 6-week course of IV antibiotics, and the TIPS was revised.
Two weeks later, he was readmitted with recurrent MSSA bacteremia. FDG-PET/CT scan was performed, showing increased TIPS uptake, consistent with tipsitis. He completed an additional 8-week IV antibiotic course. Repeat FDG-PET/CT showed decreased but persistent TIPS uptake. IV antibiotics were extended, and he was placed on suppressive oral antibiotics with a plan for FDG-PET/CT in 3 months.
Tipsitis is rare, and early infection (<120 days) is associated with gram-positive bacteria caused by seeding during placement. In this case, later infection was suspected to be caused by Staph aureus superinfection during influenza. Low-grade symptoms include malaise, and high-grade symptoms include fever and rigors. Suspicious CT findings include peri-graft gas or fluid. Radiolabeled leukocyte uptake is specific to infection, but spatial resolution is limited. FDG-PET/CT with focal TIPS metabolic activity (SUV > 8.0) correlates with infection source (sensitivity 91-98%, specificity 64–91%).
Antibiotic therapy is successful in 53% of cases, and FDG-PET/CT can determine the degree of treatment success. Residual hypermetabolic activity signifies partial response. Aggressive antibiotics are recommended to prevent resistance and the need for liver transplant. FDG-PET/CT plays a vital role in diagnosis and management of tipsitis. Read More

Authors:  Cregg Allison , Nguyen Theo , Holm Tara , Flanagan Siobhan

Keywords:  Portal Vein Thrombosis, FDG PET, Interventional Radiology

Panesar Harsimran,  Beekman Alexander,  Martin Laura,  Armstrong Katherine,  Hodes Aaron

Final Pr. ID: Poster #: CR-006

Midgut volvulus in children is uncommon, but diagnosis of portal vein thrombosis in association with midgut volvulus has been rarely reported. We present a case of a 3-year old male with an unusual presentation of recurrent episodic abdominal pain suspected initially having ileocolic intussusception. Cross-sectional imaging identified extensive acute portomesenteric thrombosis in the setting of suspected midgut volvulus, which was confirmed on upper GI series and at surgery. A thrombophilia workup was negative. To our knowledge, this is the first case of acute portal vein and superior mesenteric vein thrombosis with splenic vein extension in association with midgut volvulus. When the diagnosis remains elusive and imaging demonstrates an extensive acute PVT with SMV extension in children and adolescents, radiologists should consider midgut volvulus in addition to other etiologies, such as malignancy, cirrhosis, or bowel inflammation. Read More

Authors:  Panesar Harsimran , Beekman Alexander , Martin Laura , Armstrong Katherine , Hodes Aaron

Keywords:  Portal vein thrombosis, Superior mesenteric vein thrombosis, Midgut volvulus