case_images: PMC2225466_01
case_images: Findings at endoscopy. Note the large ulcerative gastric mass on the
  greater curve of the stomach.
case_images: SRCM2007-82012.001.jpg
case_images: PMC2225466_01_SRCM2007-82012.001.jpg
case_images: fig1
case_images: Endoscopy showed a large focally ulcerative gastric mass on the greater curve with prominent underlying vasculature (see Figure 1).
case_images: Photomicrograph (x200) of the original
  resection specimen showing a cellular and epithelioid neoplasm.
case_images: SRCM2007-82012.002.jpg
case_images: PMC2225466_01_SRCM2007-82012.002.jpg
case_images: fig2
case_images: S100 protein, chromogranin and synaptophysin were negative, therefore supporting the morphological diagnosis of GIST (see Figure 2). Surgical excision was complete and he made a good recovery.
case_images: Computerised tomography scan of large
  abdominal mass measuring 20 x 11 x 25 cm.
case_images: SRCM2007-82012.003.jpg
case_images: PMC2225466_01_SRCM2007-82012.003.jpg
case_images: fig3
case_images: Computerised tomography (CT) scan demonstrated a large abdominal mass involving the mesentery and abdominal wall musculature measuring 20 x 11 x 25 cm (see Figure 3).
case_images: Photomicrograph (x200) of representative area of tumour at post mortem. Note the small pyknotic nuclei and areas of amorphous myxoid stroma representing areas where
  the tumour cells have disappeared. Other
  areas were virtually
  acellular.
case_images: SRCM2007-82012.004.jpg
case_images: PMC2225466_01_SRCM2007-82012.004.jpg
case_images: fig4
case_images: Histologically, the vast majority of the main mass was hypocellular consisting of scattered tumour cells staining positive with CD117 with pyknotic nuclei and condensed cytoplasm (resembling mast cells) in an abundant myxoid stroma (see Figure 4).
case_images: (a) Photomicrograph of representative area of tumour at resection 
  and (b) at post mortem stained with
  CD31, an endothelial marker
case_images: SRCM2007-82012.005.jpg
case_images: PMC2225466_01_SRCM2007-82012.005.jpg
case_images: fig5
case_images: The vessel density appeared similar, but in the autopsy slides the vessels, although of the same delicate calibre, are significantly more dilated (see Figure 5).