Diffuse B cell large ileal lymphoma presenting with obstruction and associated with Hashimoto's thyroiditis.

Primary small intestinal B cell lymphoma is a rare and often presents in its complicated form with the presence of perforation, obstruction, or bleeding. We present a 74-year-old woman with nonspecific complaints of persistent constipation. Ultrasound and computed tomography revealed a tumor of the ileum with obstruction and dilation of the intestine. The patient underwent small bowel resection with total hysterectomy. A suspected etiological factor with oncological potential in her is the long-term use of levothyroxine for Hashimoto's thyroiditis.