Pseudo-kidney sign

An ultrasonographic appearance of circumferential gastrointestinal wall thickening forming a reniform mass, with a central hyperechoic lumen or mesentery surrounded by a hypoechoic edematous wall, mimicking renal parenchyma. Typically indicating bowel pathology such as mechanical obstruction (intussusception, volvulus), malignancy (colorectal cancer, gastric cancer, small bowel lymphoma), inflammation (diverticulitis, Crohn's disease, necrotizing enterocolitis), and bowel ischemia.