Gastrointestinal stromal tumor metastasis at the site of a totally implantable venous access port insertion: A rare case report

Figure 1 Computed tomography image. A and B: Computed tomography (CT) showed a huge inhomogeneous soft tissue mass (approximately 18.1 cm × 11.9 cm) with central necrosis, occupying the entire left upper abdomen, along with two nodular enhancing liver lesions; C and D: CT after 10 mo of imatinib therapy showed marked reduction in tumor size (approximately 8.6 cm × 6.7 cm), tumor enhancement at arterial phase CT decreased substantially and hepatic metastatic lesions showed no enhancement.

Figure 2 Histology showed a few spindle cells distributed in the tumor lesion and the cells were positive for CD117 and DOG-1.

Figure 3 Computed tomography showed an inhomogeneous mass (approximately 5. 7 cm × 4.6 cm) in the right infraclavicular fossa.

Figure 4 Magnetic resonance imaging showed a mixed signal mass without involvement of surrounding soft tissue and bone.

Figure 5 Histopathology revealed strong, diffuse CD117 and DOG-1 expression, which confirmed a metastatic gastrointestinal stromal tumor.