Aneurysms are rare in children. Isolated iliac artery aneurysms are very rare, especially bilateral aneurysms. Pediatric aneurysms are usually secondary to connective tissue disorders, arteritis, or mycotic causes. We present a case of a 3-year-old child with bilateral idiopathic common iliac aneurysms that were successfully repaired with autogenous vein grafts.

Congenital renal vein aneurysms are a truncular type of venous malformation and are believed to be the outcome of defective development during the later stage of embryogenesis while the venous trunk is being formed. There have been 9 case reports so far. Here, we add the report of a patient who was incidentally detected to have a renal vein aneurysm on computed tomography angiogram. In addition, this is the first description of inferior vena cava thrombosis associated with a thrombosed saccular aneurysm of the renal vein. Case ReportA 29-year old Asian male underwent preemployment medical screening and was detected to have inferior vena cava (IVC) thrombosis on ultrasound abdomen. He was asymptomatic and had no co-morbid illnesses. His physical examination was unremarkable. There was no varicocoele. Basic blood laboratory investigations were all normal. Serum virology markers were negative. His procoagulant workup was negative. Contrast-enhanced computed tomography (CT) abdomen revealed a thrombosed saccular venous aneurysm of size 3.9x3.7 cm arising from the mid-segment of the left renal vein (Figure 1). Retrohepatic IVC was thrombosed; infrahepatic IVC, common iliac and external iliac vein were dilated. Since he was asymptomatic and the renal vein aneurysm was already thrombosed, it was decided to manage him conservatively. At follow up 1-year later, he remains asymptomatic and the aneurysm has maintained the same size. Our radiology colleagues contributed CT angiogram images of another patient with renal vein aneurysm (Figure 2). However, his clinical details could not be retrieved.

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