What condition involves twisting of the intestine and can lead to obstruction?

Volvulus is a condition where a segment of the intestine twists around itself and the mesenteric attachment, which can obstruct the lumen of the bowel. This twisting can impede blood flow, potentially leading to ischemia or necrosis of the affected bowel segment if not promptly addressed. The result is a functional obstruction that can cause severe abdominal pain, vomiting, and potentially more serious complications if not treated.

Appendicitis, while it is an abdominal emergency, refers specifically to inflammation of the appendix and does not involve twisting of the intestine. Intussusception is a separate condition where one segment of the intestine telescopes into an adjacent segment, leading to obstruction but not due to twisting. A hernia typically involves a protrusion of an organ through a defect in the abdominal wall and does not specifically indicate twisting of the intestinal tract. Thus, volvulus is the only condition of the options provided that specifically describes the twisting mechanism leading to obstruction.