We experienced a very rare case of leiomyoblstoma of the transverse mesocolon.
A 44-year-old man was admitted to the hospital because of upper abdominal tumor which was found with abdominal ultrasound sonography at a physical checkup. Abdominal angiography showed tumor vessels and a tumor shadow fed by middle colic artery. Under a diagnosis of primary tumor arising in the transverse mesocolon, an operation was performed.
During operation the tumor arising from the transverse mesocolon was found in the bursa omentalis. To remove the tumor, a partial resection of the transverse mesocolon and greater omentum was performed. The resected tumor was 7×6×6cm in size and 350g in weight. In the cross section, hemorrhagic necrosis was contained. Histological diagnosis was leiomyoblastoma of the transverse mesocolon.
He has been doing well 10 months after the operation without any symptoms or signs of recurrence.
We report this case with some additional discussion on the related literature.