Adenosquamous carcinoma of the right colon: A case report and review of the literature

INTRODUCTION: Adenosquamous carcinoma is a rare colorectal tumor with both an adenocarcinoma and a squamous cell carcinoma component. To the best of our knowledge, only few cases have been reported in the literature. CASE PRESENTATION: We report a case of a 46-year-old woman, hospitalized for large bowel obstruction syndrome. Computed tomography scan showed an irregular mass of the right colic angle, responsible for an occlusive syndrome with distension of the right colon, the appendix and the terminal ileum. The patient underwent right hemicolectomy with D2 lymphadenectomy. Histopathological examination revealed mixed adenocarcinoma and squamous carcinoma. Adjuvant chemotherapy was prescribed for the patient. DISCUSSION: Adenosquamous carcinoma is a rare colorectal neoplasm revealed by non-specific complaints. Its clinicopathology is not yet understood. Preoperative diagnosis is often difficult. Surgical resection remains the mainstay of treatment. CONCLUSION: Adenosquamous carcinoma is a malignant tumor with poorer prognosis than adenocacinomas. (C) 2018 Published by Elsevier Ltd on behalf of IJS Publishing Group Ltd.