A case of glucagonoma with skin lesions, anemia, and hypoaminoacidemia markedly improved by medical therapy

Toshiaki Ohkuma, Masanori Iwase, Yasuhiro Idewaki, Yohei Kikuchi, Hiroki Fujii, Miwako Oku, Shoko Morimoto, Yasufumi Doi, Udai Nakamura, Mitsuo Iida