De novo distal terminal ileum adenocarcinoma mimicking Crohn's disease and diagnostic challenges in imaging: a case series.

De novo small bowel adenocarcinoma (SBA) in the terminal ileum is the least common of the SBA types. However, its highest prevalence is found in the presence of Crohn's disease (CD). As patients with SBA and CD present with similar symptoms, there is a high chance of misdiagnosing SBA as CD. This can lead to delay in proper diagnosis and can affect prognosis. In this article, we discuss two cases of de novo SBA mimicking CD, in the absence of CD, on conventional CT, CT enteroclysis and magnetic resonance imaging (MRI) enteroclysis. Moreover, it underlines the importance of suspecting SBA in cases where there is a lack of response to long-term medical treatment.