Takayasu Arteritis with Fistulizing Crohn's Disease: A Rare Presentation.

Crohn's disease (CD) is a chronic, recurrent, transmural inflammatory disease with lesions anywhere in the gastrointestinal (GI) tract. Takayasu arteritis (TA) is an idiopathic, chronic, granulomatous inflammatory panarteritis that involves the aorta and its branches, known as "pulseless disease." Crohn's disease and TA are both associated, as both are granulomatous disorders, and multiple cases of simultaneous occurrence of both diseases have been reported. Here we are reporting a rare case of simultaneous CD and TA in a young female who had a large enteroenteric fistula between the colon and jejunum and total occlusion of both subclavian arteries with reformed collaterals. The patient was managed with IV antibiotic, IV fluid, and steroid. This unique presentation underscores the importance of considering a potential association between the two conditions in patients presenting with GI symptoms and vascular symptoms.