case_images: PMC6114066_01
case_images: Abdominal CT showed well-defined isodensity oval mass at the tip of appendix (a). In contrast-enhanced CT, the lesion was gradually enhanced homogeneously from arterial phase (b) to equilibrium phase (c).
case_images: CRIS2018-9191503.001.jpg
case_images: PMC6114066_01_CRIS2018-9191503.001.jpg
case_images: fig1
case_images: Contrast-enhanced CT revealed a lesion with gradual homogeneous contrast enhancement from the arterial phase to the equilibrium phase (Figure 1).
case_images: Abdominal ultrasonography showed that a well-demarcated hypoechoic mass of 22 mm x 18 mm x 18 mm. There were cystic area and blood flow sign.
case_images: CRIS2018-9191503.002.jpg
case_images: PMC6114066_01_CRIS2018-9191503.002.jpg
case_images: fig2
case_images: The tumor size was 22 mm x 18 mm x 18 mm, with some cystic area and blood flow (Figure 2).
case_images: Pathological finding in HE staining showed spindle-shaped heterotypic cells proliferating in a bundle (a). In immunohistochemical studies, the nucleus stained by S-100 protein (b).
case_images: CRIS2018-9191503.003.jpg
case_images: PMC6114066_01_CRIS2018-9191503.003.jpg
case_images: fig3
case_images: Immunohistochemical studies revealed negative values for KIT and CD34 and positive values for S-100 protein (Figure 3), which confirmed the schwannoma of the appendix.