Fig. 1
From: Oral mucosal melanoma treated with carbon ion radiotherapy: a case report
A 66-year-old man with mucosal melanoma of the right maxillary gingiva and palate. (a) Intraoral photograph before carbon ion radiotherapy (C-ion RT). (b) Gadolinium-enhanced T1-weighted magnetic resonance image before C-ion RT. Yellow arrow revealed a mass on the maxillary gingiva (16 × 10 mm). (c) F-18 fluorodeoxyglucose positron emission tomography image before C-ion RT. Yellow arrow revealed abnormal accumulation in the tumor