Malignant Small Bowel Obstruction from Hernia Mesh Invasion by Jejunal Adenocarcinoma: A Report of a Rare Case.

BACKGROUND Small bowel obstructions (SBO) are common and can be caused by various pathologies including intra-abdominal adhesions and hernias. Less frequently, these obstructions are caused by malignancy. The following article will review the etiology and treatment of SBOs, discuss complications of hernia repair with mesh, and examine if there is an association between mesh and cancer. CASE REPORT We present the case of a man who was over 89 years old who presented with an SBO that failed non-operative management. He previously had bilateral inguinal hernia repairs with mesh and pelvic radiation for prostate cancer. Imaging obtained during the workup was concerning for malignancy. Exploratory laparotomy revealed an ascending colon adenocarcinoma and small bowel obstruction secondary to jejunal adenocarcinoma. The jejunal adenocarcinoma was adhered to and invaded into the mesh from a previous hernia repair. He underwent successful resection and anastomosis, had an uneventful postoperative course, and was discharged. Given his advanced age, he refused further workup or treatment. CONCLUSIONS The etiology and management of small bowel obstructions is multifactorial. Small bowel obstructions affect a large portion of the population worldwide and the subsequent management accounts for significant health care spending. This case shows an exceedingly rare and possibly novel case of jejunal adenocarcinoma that invaded into the hernia mesh, leading to a malignant small bowel obstruction. While there is not a clear explanation behind this patients' pathology, we hypothesize that his prior hernia surgery led to an intra-abdominal adhesion, and subsequent pelvic radiation may have facilitated the malignancy invading the mesh and causing a high-grade small bowel obstruction.