A strange renal tumor – First report of Crohn's disease in the kidney

Crohn's disease is a granulomatous inflammatory bowel disease with characteristic histopathological findings. Any part of the gastrointestinal tract can be involved, but it is extremely rare to find cases when it spreads beyond the intestinal structures. We present a case of a woman with extraintestinal Crohn's disease in the left kidney, mimicking renal tumor. Rare cases reported in the literature describe involvement of the inner ear, the nasal cavity, supraglottic structures, glottis, and skin, but not that of the kidneys. A 51-year-old female patient with a previous history of two colonic resections due to C…