克隆氏病(又称局限性肠炎)是一种慢性肉芽肿性胃肠道全层受累的疾病。根据文献报道,病人以肠梗阻,瘘管,消化道出血,右下腹包块及不明原因发热,体重下降而就诊的陆续均有报道,但临床上以烟酸缺乏症而就诊尚属少见,国内杂志报道甚 Crohn’s disease (also known as Crohn’s disease) is a chronic granulomatous disease involving the entire gastrointestinal tract. According to reports in the literature, patients with intestinal obstruction, fistula, gastrointestinal bleeding, right lower quadrant mass and unexplained fever, weight loss and treatment have been reported one after another, but the clinical treatment of niacin deficiency is still rare, the domestic magazine Reported very