A rare case of massive colonic distention secondary to undiagnosed colon adenocarcinoma

Colonic distention is a critical condition arising from various abdominal pathologies. It necessitates both timely diagnosis and intervention to prevent severe complications such as ischemia or perforation. We present the case of a 69-year-old male with an 8-month history of progressive abdominal distention, minimal bowel movements, occasional vomiting, and significant weight loss. Imaging revealed high-grade colonic dilatation with a severe diffuse stool burden. Consequently, a self-expandable metallic stent (SEMS) was placed successfully, relieving the obstruction and serving as a bridge to elective surgical management. This case highlights the subtle and insidious progression of symptoms in some patients with malignant colonic obstruction, sometimes leading to a delayed presentation and diagnosis. It emphasizes the role of SEMS as an effective, minimally invasive intervention as a bridge for definitive surgical management. Early recognition and intervention in cases of progressive colonic distention are critical to optimizing patient outcomes. • Colonic distention necessitates both timely diagnosis and intervention. • Malignant colonic obstruction can have subtle and insidious progression of symptoms. • 10 % of primary colorectal cancers present as a large bowel obstruction. • Complications can be catastrophic, such as ischemia and resulting perforation. • Self-expandable metallic stent serves as a bridge to definitive surgical management.