Journal of Medical Cases, ISSN 1923-4155 print, 1923-4163 online, Open Access
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Case Report

Volume 11, Number 1, January 2020, pages 16-21

Soft-Tissue Myoepithelioma of the Retroperitoneal Space Mimicking a Pancreatic Tumor: A Case Report and Literature Review

Figures

Figure 1.
Figure 1. Abdominal CT scan of the left upper quadrant heterogeneous mass measuring 13.6 × 11.0 × 11.0 cm. The stomach is displaced laterally. CT: computed tomography.
Figure 2.
Figure 2. PET-CT scan shows 14.6 × 10.5 × 10.2 cm mass with cystic and solid regions and patchy tracer uptake (max SUV is 5.4). PET-CT: positron emission tomography-computed tomography; SUV: standardized uptake values.
Figure 3.
Figure 3. Microscopic examination shows chondroid stroma with monotonous spindle cells with predominantly retiform features, focal plasmacytoid cell morphology and cartilaginous differentiation (H&E, a: × 200 magnification; b: × 400 magnification). H&E: hematoxylin & eosin.
Figure 4.
Figure 4. The diffuse expression of S-100 protein by tumor cells (a: × 100 magnification; × 400 magnification).
Figure 5.
Figure 5. The intensive diffuse CAM5.2 expression of tumor cells (a: × 40 magnification; b: × 400 magnification).
Figure 6.
Figure 6. The diffuse expression of SMA by tumor cells (a: × 40 magnification; b: × 200 magnification). SMA: smooth muscle actin.