Endometriosis of the Colon and Pericolic Lymph Nodes Presenting as Cecal Volvulus.

Endometriosis, characterized by the ectopic implantation of endometrial tissue, typically involves pelvic structures but infrequently extends to extrapelvic sites such as the gastrointestinal tract. In this report, we present a case of a 44-year-old woman with diffuse abdominal discomfort and constipation. Computed tomography imaging revealed a mass in the cecum, leading to diagnostic colonoscopy and subsequent magnetic resonance imaging. Ultimately, laparoscopy revealed a puckered cecal mass suspected to be invasive malignancy but pathologically confirmed as extensive endometriosis involving the colonic wall and pericolic lymph nodes. Cecal volvulus secondary to endometriosis is exceedingly rare, with surgical intervention being the primary treatment modality. Endometriosis-associated gastrointestinal involvement often masquerades as irritable bowel syndrome, highlighting the importance of considering atypical presentations in young women. This case underscores the need to maintain a high index of suspicion for unusual etiologies in patients with gastrointestinal symptoms and atypical imaging findings to facilitate timely diagnosis and management.