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. 2023 May 24;27(1):2595. doi: 10.4102/sajr.v27i1.2595

FIGURE 5.

FIGURE 5

Primary mesenteric gastrointestinal stromal tumour. Transverse grey scale ultrasound image (a) in a 32-year-old female shows a large well-defined heterogenously hypoechoic mesenteric mass lesion measuring ~14 cm × 10 cm × 9.1 cm in size with lobulated margins. Axial (b) and coronal (c) contrast enhanced CT images reveal a large well-defined heterogenously enhancing mass lesion in the mesentery. The lesion shows lobulated margins and non-enhancing central necrotic area occupying > 50% of the area of tumour. No calcification, gas foci or cavitation is observed within the lesion. No direct invasion into surrounding bowel loops is noticed. An enhancing vessel is seen traversing through the mass (white arrow) Immunohistochemistry image of the surgical specimen (d) shows tumour cells positive for tumour marker for gastrointestinal stromal tumour (GIST), that is DOG-1 (discovered on GIST-1).