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Insights into Imaging
Fig. 18 | Insights into Imaging

Fig. 18

From: Primary and secondary tumors of the peritoneum: key imaging features and differential diagnosis with surgical and pathological correlation

Fig. 18

Pseudomyxoma peritonei arising from a perforated appendiceal mucinous neoplasm, in a 65-year-old man complaining of abdominal fullness and discomfort. Coronal (a) and axial (b, c) CT images in the portal phase show a cystic dilatation of the appendix with thin internal septa and peripheral calcifications, representing an appendiceal mucinous neoplasm (red arrows). Note the focal perforation of the tumor (green arrowhead) with mucin leakage (yellow arrows), as well as the loculated ascites representing acellular mucin pools (white asterisks). d Intraoperative view shows the perforated appendiceal mucinous neoplasm (red arrows) with output of yellowish mucinous material (yellow arrow). e Dissection of the surgical specimen of appendectomy, showing the presence of whitish calcifications in the appendiceal wall. f H&E stain photomicrograph shows bluish lakes of mucin with sheets of epithelial cells and minimal atypia, findings consistent with a LAMN

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