Did you know? Aphthous ulcers are among the earliest mucosal lesions in #Crohnsdisease. These small (1-5 mm) superficial lesions, often surrounded by a ring of reddened tissue, typically emerge on the distal ileum. Left untreated, they can progress into larger, transverse linear ulcers. #IBD Source: The Microbiome of Crohn’s Disease Aphthous Ulcers (Gut Pathology, 10 Oct 2018)
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