case_images: PMC6600760_01
case_images: Perforated Jejunal tumor with peritonitis.
case_images: CEG-12-279-g0001.jpg
case_images: PMC6600760_01_CEG-12-279-g0001.jpg
case_images: F0001
case_images: After peritoneal lavage with warm saline, we noticed a large 8x8 cm perforated tumor in the distal jejunum (Figure 1).
case_images: H& E stain (40X): Small round cells with perivesicular and pseudorosettes formation.
case_images: CEG-12-279-g0002.jpg
case_images: PMC6600760_01_CEG-12-279-g0002.jpg
case_images: F0002
case_images: Histopathological examination was suggestive of malignant round cell tumor (Figure 2), and Immunohistochemistry (IHC) was advised.
case_images: CD99: Diffuse membranous positive (40X).
case_images: CEG-12-279-g0003.jpg
case_images: PMC6600760_01_CEG-12-279-g0003.jpg
case_images: F0003
case_images: Tumor cells were positive for CD99(diffuse strong) (Figure 3), synaptophysin (focal) (Figure 4), and Ki 67(80%) (Figure 5) and negative for CD3,CD20,CD5,CD10,TdT (terminal deoxynucleotidyl transferase), panCK (pancytokeratin), chromogranin and CD56.
case_images: Ki 67 nuclear positive (40X).
case_images: CEG-12-279-g0004.jpg
case_images: PMC6600760_01_CEG-12-279-g0004.jpg
case_images: F0004
case_images: Tumor cells were positive for CD99(diffuse strong) (Figure 3), synaptophysin (focal) (Figure 4), and Ki 67(80%) (Figure 5) and negative for CD3,CD20,CD5,CD10,TdT (terminal deoxynucleotidyl transferase), panCK (pancytokeratin), chromogranin and CD56.
case_images: Synaptophysin cytoplasmic focal positive.
case_images: CEG-12-279-g0005.jpg
case_images: PMC6600760_01_CEG-12-279-g0005.jpg
case_images: F0005
case_images: Tumor cells were positive for CD99(diffuse strong) (Figure 3), synaptophysin (focal) (Figure 4), and Ki 67(80%) (Figure 5) and negative for CD3,CD20,CD5,CD10,TdT (terminal deoxynucleotidyl transferase), panCK (pancytokeratin), chromogranin and CD56.