An abdominal mass may occur in the right upper quadrant, left upper quadrant, right lower quadrant, or left lower quadrant. The stomach is also divided into two sections: the epigastric section ...

with marked guarding and rebound tenderness in the left lower quadrant. Bowel sounds were decreased. After sedation, a rectal examination showed a firm, tender mass, 6 by 6 cm., just to the left ...