Fig. 1From: Successful resection of a neuroendocrine tumor in the gallbladder: a case reportUltrasound of the gallbladder showed a well-defined, smooth mass of mixed hypo- and iso-echogenicity at the gallbladder neck (arrows). a The diameter of the mass was 8.3 mm. b The tumor increased in size to 9.9 mm. Scale bar = 10 mmBack to article page