Extraintestinal manifestations in children with IBD, growth retardation, aphthous ulcers, arthropathy, oculopathy, and skin lesions are common, and all of them are associated with immune-mediated pathogenesis.[28,29] Since malnutrition and growth retardation are important issues in pediatric CD, Song et al[30] investigated the prevalence of nutritional and growth status in Korean children with CD and found subnormal serum levels of hemoglobin, albumin, iron, ferritin, calcium, magnesium, folate, vitamin B12, and zinc. Here, ALB is linked to canker sore.