PMC10243548_01
A 4-year-old female patient with EWT. The CT scan in a transverse position reveals the presence of an oval mixed-density mass in the left middle and lower abdomen, with a bone spur extending from the front of the lumbar fourth vertebra to the back of the mass (1A). In the sagittal position, the CT scan shows a slight collapse of the bone in the anterior part of the lumbar fourth vertebrae and the presence of a bone spur on the anterior edge (1B). Additionally, image C displays the 100x hematoxylin-eosin (HE) staining of the tumor, revealing the presence of multilayered differentiated tumors (1C).
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F1
The mass was primarily composed of fat density (Figure 1A), with a small amount of punctate calcification at the edge, and showed slight enhancement after the enhancement process. Moreover, the fourth lumbar vertebral body's anterior portion had collapsed, and a bone spur had formed at the anterior edge, growing forwards and upwards through the beginning of the left common iliac artery before finally reaching the back of the mass (Figure 1B). The pathological examination revealed the presence of multilayered differentiated tumors, primarily composed of nephroblastoma components with germ-like structures and a small number of tubule-like structures, adipose tissue, glandular epithelial differentiation, and localized myxoid degeneration (Figure 1C).
PMC10243548_02
A 3-year-old male patient with EWT. In the CT transverse position, a soft tissue mass is visible behind the left peritoneum. The mass extends across the midline and features a bone spur located at the front of the fifth lumbar vertebrae body, with its tip reaching the posterior edge of the mass (2A). In the sagittal position, the CT scan shows the presence of a bone spur that originated from the anterior edge of the L5 vertebral body and grew forward and upward to the posterior edge of the mass (2B). Additionally, image C displays the 100x hematoxylin-eosin (HE) staining of the tumor, revealing the presence of epithelial tumor cells and mesenchymal tumor cells (2C).
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F2
The mass measured approximately 38 mm in length, 64 mm in width, and 44 mm in height in the image (Figure 2A). Additionally, a bone spur was observed originating from the anterior edge of the fifth lumbar vertebral body, growing forward and upward to the posterior edge of the mass (Figure 2B). Furthermore, epithelial tumor cells were arranged in small tubules, accounting for about 30%-40% of the tumor tissue area, while a few mesenchymal tumor cells were observed, accounting for approximately 5%-10% of the tumor tissue area (Figure 2C).