Which of the following is NOT an extraintestinal feature of inflammatory bowel disease (IBD)?

In the context of inflammatory bowel disease (IBD), extraintestinal features are manifestations occurring outside the digestive tract that are associated with the disease. Aphthous ulcers, clubbing, and sclerosing cholangitis are all known extraintestinal complications linked to IBD.

Aphthous ulcers can appear in conjunction with the gastrointestinal symptoms of IBD, characterized by painful, shallow ulcers in the oral mucosa. Clubbing, which refers to the enlargement of the fingertips and toes, can result from chronic hypoxia or conditions like IBD. Sclerosing cholangitis is a specific liver condition associated with IBD, particularly ulcerative colitis, leading to inflammation and scarring of the bile ducts.

On the other hand, aortic dissection is not recognized as an extraintestinal feature of IBD. While cardiovascular complications can arise in the setting of various inflammatory conditions, aortic dissection is specifically a tear in the aortic wall and is not directly caused by IBD or its extraintestinal manifestations. Therefore, identifying aortic dissection as the option that does not fit in line with extraintestinal features of IBD is accurate.