著者

Shingo Fujita Junji Kozawa Chisaki Ishibashi Takekazu Kimura Tetsuhiro Kitamura Kenji Fukui Tetsuyuki Yasuda Hiromi Iwahashi Akihisa Imagawa Iichiro Shimomura

出版者

The Japanese Society of Internal Medicine

雑誌

Internal Medicine (ISSN:09182918)

巻号頁・発行日

vol.56, no.11, pp.1383-1385, 2017-06-01 (Released:2017-06-01)

参考文献数

14

被引用文献数

1 1

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An impaired awareness of hypoglycemia is a serious problem in diabetic patients, which can lead to life-threatening severe hypoglycemia. Recurrent hypoglycemia attenuates the function of the central, mainly hypothalamic, nervous system and it causes an impaired awareness of hypoglycemia. Vitamin B12 deficiency is also associated with the dysfunction of central nervous system. We report a 72-year-old type 1 diabetic patient with vitamin B12 deficiency whose impaired awareness of hypoglycemia improved after 4 weeks of vitamin B12 administration with an increased counter-hormone secretion in response to hypoglycemia. We should recognize vitamin B12 deficiency as one of the causes of an impaired awareness of hypoglycemia in diabetic patients.