“…(3,4) There have been very few cases in which a pheochromocytoma mimics SSc or occurs in an SSc patient. (5) In our case, a 57-year-old man presented with hand pain and facial skin thickening that rapidly progressed to the neck and both upper arms over a period of three months. Physical examinations indicate that the patient had Raynaud's phenomenon (RP), which had appeared 12 months before, with sclerodactyly ( Fig.…”