Areas resembling aneurysmal bone cyst, with osteoclast-like giant cells, blood-filled spaces, hemosiderin-laden macrophages, and fibromembranous
septa are often present .
Surgical pathology showed gastric duplication with hemorrhagic adhesive fibromembranous
tissue externally, 3.6 X 2.5 cm and 0.5 cm in thickness.
Grossly, the specimen consisted of multiple irregular fragments of soft grey white fibromembranous