Yamakawa-Yokota Fumiko, Ozaki Nobuaki, Okajima Akiko, Nishio Hideki, Nagasaka Tetsuro, Oiso Yutaka
Department of Endocrinology and Diabetes, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan.
Clin Med Res. 2010 Dec;8(3-4):159-62. doi: 10.3121/cmr.2010.888. Epub 2010 Sep 17.
A man, aged 65 years, presented with frequent episodes of hypoglycemia and unconsciousness. Hypoglycemia was accompanied by undetectable serum insulin and C-peptide levels and a high serum insulin-like growth factor (IGF)-II level. He was found to have a retroperitoneal solitary fibrous tumor. He underwent successful resection of the tumor and had no hypoglycemic episodes after the operation. Immunohistochemical analysis revealed positive immunostaining for IGF-II in tumor cells. The presence of the high-molecular-weight form of IGF-II in the patient's serum was confirmed by immunoblotting, which suggests that his hypoglycemia was due to an increase in the plasma level of IGF-II secreted by the tumor.
一名65岁男性,出现频繁低血糖发作和意识丧失。低血糖发作时血清胰岛素和C肽水平检测不到,而血清胰岛素样生长因子(IGF)-II水平升高。发现他患有腹膜后孤立性纤维瘤。他接受了肿瘤切除术,术后未再出现低血糖发作。免疫组化分析显示肿瘤细胞中IGF-II免疫染色呈阳性。免疫印迹证实患者血清中存在高分子量形式的IGF-II,这表明他的低血糖是由于肿瘤分泌的IGF-II血浆水平升高所致。