Internal Medicine, vol.53, no.16, pp.1783-1789, 2014 (Journal Indexed in SCI Expanded)
© 2014 The Japanese Society of Internal Medicine.It is well known that neurofibromatosis type 1 (NF1) is uncommonly associated with pheochromocytoma development and also, to a larger extent, with gastrointestinal stromal tumors (GISTs). We herein document three cases with the rare condition of NF1 coexisting with GIST and pheochromocytoma, while one of them also has a composite tumor and another has papillary thyroid carcinoma.