case_images: PMC11829316_01
case_images: Findings on the external appearance. Significant abdominal distention is noted.
case_images: cureus-0017-00000077532-i01.jpg
case_images: PMC11829316_01_cureus-0017-00000077532-i01.jpg
case_images: FIG1
case_images: Subsequent abdominal CT revealed a cystic mass, prompting referral to our hospital (Figure 1).
case_images: Chest X-ray (posterior-anterior). Diaphragmatic elevation is evident (red arrows).
case_images: cureus-0017-00000077532-i02.jpg
case_images: PMC11829316_01_cureus-0017-00000077532-i02.jpg
case_images: FIG2
case_images: Abdominal X-ray (anterior-posterior). Displacement of the bowel loops by an abdominal mass is evident (red arrows).
case_images: cureus-0017-00000077532-i03.jpg
case_images: PMC11829316_01_cureus-0017-00000077532-i03.jpg
case_images: FIG3
case_images: Magnetic resonance imaging (coronal view, T2-weighted). A well-defined cystic mass measuring 30 cm in diameter with high signal intensity is shown.
case_images: cureus-0017-00000077532-i04.jpg
case_images: PMC11829316_01_cureus-0017-00000077532-i04.jpg
case_images: FIG4
case_images: Contrast-enhanced abdominal computed tomography (axial view). A massive fluid-density cystic lesion occupying the abdominal cavity was revealed. The lesion's septations (yellow arrow) and vessels running within the septa were branches of the gastroepiploic artery (red arrows), confirming the greater omentum as the cyst's origin. The superior mesenteric artery was displaced to the right (white arrow).
case_images: cureus-0017-00000077532-i05.jpg
case_images: PMC11829316_01_cureus-0017-00000077532-i05.jpg
case_images: FIG5
case_images: The superior mesenteric artery was displaced to the right (Figure 5).
case_images: SAND balloon catheter. (a) Aspiration of cystic fluid using a SAND balloon catheter (Hakko Medical Industry); (b) Prevention of fluid dispersion by inflating the balloon inside (yellow arrow) and outside (red arrow) the cyst wall.
case_images: cureus-0017-00000077532-i06.jpg
case_images: PMC11829316_01_cureus-0017-00000077532-i06.jpg
case_images: FIG6
case_images: A lower umbilical incision was created to access the abdominal cavity, following which a SAND balloon catheter (Hakko Medical Industry, Tokyo, Japan), with inflation both inside and outside the cyst wall, was used to prevent fluid leakage during aspiration (Figure 6).
case_images: Intraoperative findings. Perioperative examination showing a lymphangioma originating from the greater omentum.
case_images: cureus-0017-00000077532-i07.jpg
case_images: PMC11829316_01_cureus-0017-00000077532-i07.jpg
case_images: FIG7
case_images: We confirmed the lesion to be a lymphangioma originating from the greater omentum (Figure 7).