Follicular Lymphoma Presenting as Intussusception in an Adult.

A 61-year-old male with no past medical history presented with intense abdominal pain for three days, associated with hematochezia, nausea, and non-bloody vomiting. CT scan of the abdomen showed distended small bowel, diffuse lymphadenopathy, and intussusception of the distal ileum into the cecum with obstruction. Ileocolic resection and histopathological staining confirmed the diagnosis of follicular lymphoma and appropriate treatment was initiated. Intussusception is a condition that involves the invagination of the proximal segment of a bowel tract into its contiguous distal segment as a result of enthusiastic or impaired peristalsis. Only 5% of the total intussusception cases are found in adults. Most cases in adults are caused by pathological lead points which can be benign or malignant. Lymphomas rarely present with intussusception and follicular lymphomas are even less common. To the best of our knowledge, there have only been a few such cases of follicular lymphomas with the initial presentation of intussusception. In this article, we present a rare case of follicular lymphoma presenting as intussusception. Considering lymphomas as a cause of intussusception in adults can decrease diagnostic delays and guide treatment.