Superior mesenteric arteriovenous fistula as a rare manifestation of Cowden syndrome: A case report and review of literature

Figure 2 Upper abdominal magnetic resonance imaging. The liver is slightly reduced in volume, with a wavy contour and widened fissures. A roundish lesion with hypointense T1-weighted and hyperintense T2-weighted signals is observed in the left hepatic lobe adjacent to the falciform ligament (orange arrow), measuring approximately 1.3 cm in diameter and demonstrating nodular enhancement on contrast-enhanced imaging. The portal vein is dilated, with a maximum diameter of 1.8 cm. Splenomegaly is present, with heterogeneous signal intensity and an irregular contour.