PMC6243330_01
Findings on CT scan. A 36 x 24 mm mass is located in the lesser curvature of the stomach (arrows). The mass is calcified and slowly enhancing. (a) Plain image, (b) early phase in contrast dynamic study and (c) delayed phase.
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On dynamic contrast-enhanced CT scan, the mass was slowly enhancing (Figure 1).
Findings on MRI. Arrows show the mass at the lesser curvature. (a, b) The mass shows a dark intensity on T2 weighted imaging. (c) The mass shows signal intensity almost equal to that of the gastric wall on T1 weighted imaging, but contains an area of darker intensity. This area was consistent with the calcification seen on the CT scan, so it was considered to indicate calcification. (d) The mass does not show restricted diffusion.
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The mass did not show high signal intensity on diffusion weighted imaging (Figure 2).
Findings on endoscopic ultrasonography. The mass is a hypoechoic lesion containing a high spot with an acoustic shadow.
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The hyperechoic component was considered to indicate a calcification (Figure 3). The operator was unable to identify the layer that the mass existed on. The mass was suspected to be a gastrointestinal stromal tumour (GIST) preoperatively on account of this being a more common type of gastric tumour.