PMC7390617_01
Magnetic resonance imaging. a T1-weighted image revealed a tumor with a clear border. b T2-weighted imaging revealed a low- and high-signal tumor. c Contrast-enhanced imaging revealed a tumor with a smooth edge.
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T2-weighted images showed a high-intensity heterogeneous region (Figure 1b). The apparent diffusion coefficient was not very low, and contrast-enhanced MRI showed nonuniform contrast (Figure 1c).
Gross appearance. a The size of the tumor was 11x10 cm.. b Split face showed pink and white solid mass.
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The tumor appeared to arise from the mesojejunum and then extend into the abdominal cavity, involving the jejunum. The tumor was resected en bloc with wide margins. The resected specimen showed that the tumor was approximately 11 cm x10 cm in size (Figure 2).
Histopathological findings.. a Microscopic examination showed a storiform pattern (H.E. staining). b Over 50% of the tumor was composed of myxoid areas. c Mitotic figures were present relatively frequently.
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Hematoxylin and eosin staining showed a storiform pattern (Figure 3a), and over 50% of the tumor was composed of myxoid areas (Figure 3b). High cell density and mitotic figures were relatively frequent (Figure 3c).
Immunohistochemical findings.. a Ki67 immunostaining was positive. b Alcian-blue immunostaining was positive.
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Immunohistochemical examination revealed high Ki67 expression (Figure 4a), and the tumor cells were positive for alcian blue (Figure 4b).