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曾有人认为癌肿患者不宜使用维生素B_(12),亦有报导:维生素B_(12),能促进动物某些类型肿瘤的增生(《国外医学情报》维生素与肿瘤,1983,24期)。但有人发现在恶性贫血的情况下缺乏维生素B_(12)时有增高胃癌和白血病发生的机会。有用小剂量维生素B_(12)治疗神经母细胞瘤取得疗效,但大剂量时,则促进恶化(《河南医药》4(3):180,1984)。最近,Kinn AC等(J urol 1984,131(5):888)报道,下腹或盆腔癌肿在治疗期间,除因放射治疗导致肠道狭窄及瘘管形成外,尚因放射性损伤导致肠道吸收功能障碍。一般认为回肠下段受损伤或因癌肿须
It has been suggested that patients with cancer should not use vitamin B12, and it is reported that vitamin B12 can promote the proliferation of certain types of tumors in animals (“Foreign Medical Intelligence,” Vitamins and Tumors, 1983, no. 24). However, it was found that in the absence of pernicious anemia, the lack of vitamin B12 may increase the chance of gastric cancer and leukemia. The use of small doses of vitamin B 12 to treat neuroblastomas is effective, but at higher doses it is worsened (Henan Medicine 4(3): 180, 1984). Recently, Kinn AC et al. (Jurol 1984, 131(5):888) reported that in addition to radiation therapy, bowel stenosis and fistula formation are caused during radiotherapy, but radiation absorption causes intestinal absorption function. obstacle. It is generally believed that the lower ileum is damaged or due to cancer