case_images: PMC7512081_01
case_images: These sagittal and axial cuts from CT scan after appendectomy shows fluid-filled mildly distended appendicular stump with no abnormally thickened wall. An adjacent well-defined fluid collection is seen caudally, showing a density of 20 Hounsfield units.
case_images: CRIS2020-8850403.001.jpg
case_images: PMC7512081_01_CRIS2020-8850403.001.jpg
case_images: fig1
case_images: His CT abdomen showed a well-defined mass-like lesion about 5 x 5 cm in diameter of fluid density (22 HU) suggesting thick fluid in the right iliac fossa; the stump of the removed appendix is well demonstrated and about 4 cm in length and closely related to the lower part of this collection (Figure 1).
case_images: Operative photograph of laparoscopic exploration showing cecum (green arrow) gelatinous material (blue arrows) and terminal ileum (red arrow).
case_images: CRIS2020-8850403.002.jpg
case_images: PMC7512081_01_CRIS2020-8850403.002.jpg
case_images: fig2
case_images: The patient underwent laparoscopic exploration with excision of the subserosal appendicular stump of about 5 cm and cyst extending from the tip and distal part of the appendix to the pelvis, easily separable from the pelvis, containing gelatinous yellowish material (Figures 2-4).
case_images: Operative picture of the stump (yellow arrow) and mesentery (blue arrow) after the gelatinous material has been separated. The tip was attached to the mucoid jelly-like material and shows abnormal tissue.
case_images: CRIS2020-8850403.003.jpg
case_images: PMC7512081_01_CRIS2020-8850403.003.jpg
case_images: fig3
case_images: The patient underwent laparoscopic exploration with excision of the subserosal appendicular stump of about 5 cm and cyst extending from the tip and distal part of the appendix to the pelvis, easily separable from the pelvis, containing gelatinous yellowish material (Figures 2-4).
case_images: Laparoscopic view of the stump (green arrow), cecum (orange arrow), and terminal ileum (blue arrow).
case_images: CRIS2020-8850403.004.jpg
case_images: PMC7512081_01_CRIS2020-8850403.004.jpg
case_images: fig4
case_images: The patient underwent laparoscopic exploration with excision of the subserosal appendicular stump of about 5 cm and cyst extending from the tip and distal part of the appendix to the pelvis, easily separable from the pelvis, containing gelatinous yellowish material (Figures 2-4).
case_images: Low-power view of the lesion, H and E x10. Red arrow highlights the dysplastic mucosa. Note the mucin in the wall (black arrow).
case_images: CRIS2020-8850403.005.jpg
case_images: PMC7512081_01_CRIS2020-8850403.005.jpg
case_images: fig5
case_images: At the same time, the histopathology of the stump showed appendix measuring 4 cm in length and 0.6 cm in diameter with low-grade appendiceal mucinous neoplasm (LAMN) (Figures 5-7).
case_images: High power displaying the atypical mucosa, H and E x20.
case_images: CRIS2020-8850403.006.jpg
case_images: PMC7512081_01_CRIS2020-8850403.006.jpg
case_images: fig6
case_images: At the same time, the histopathology of the stump showed appendix measuring 4 cm in length and 0.6 cm in diameter with low-grade appendiceal mucinous neoplasm (LAMN) (Figures 5-7).
case_images: Dysplastic mucosa lining the lesion, H and E x40.
case_images: CRIS2020-8850403.007.jpg
case_images: PMC7512081_01_CRIS2020-8850403.007.jpg
case_images: fig7
case_images: At the same time, the histopathology of the stump showed appendix measuring 4 cm in length and 0.6 cm in diameter with low-grade appendiceal mucinous neoplasm (LAMN) (Figures 5-7).