Abstract
A nine-year-old boy had abdominal pain, nausea and vomiting after being hit strongly the abdomen against a dodge ball. When he was seen at the hospital, slight tenderness in the right hypochondrial region was noted, and no mass was palpated. After that abdominal pain disappeared, but a mass developed in the region. Two days later, a palm-sized mass could be palpated. The mass had a smooth surface, was fluctuant, and could be moved slightly up and down. Blood biochemistry tests revealed positive C-reactive protein (CRP) and an increased sedimentation rate. An echogram and CT scan revealed a hemorrhaging multiocular cystoma that was inside or adjacent to the liver. A hepatic or mesenterial cyst was suspected. Because the mass was prone to enlargement and signs of peritoneal irritation emerged, laparotomy was performed. A 16×9×5cm multiocular capsular mass with cavernous hematoma was found in the mesentery of the transverse colon. Although the mass was attached to the transverse colon and duodenum, it could be removed. Pathohistological diangosis was multiocular lymphangioma with hematoma.
