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Objective: Low-grade appendiceal mucinous neoplasms (LAMN) are debated about their potential to cause invasion and pseudomyxoma peritoneii (PMxP). Our aim was to examine these neoplasms by two invasion markers: matrix metalloproteinases- 2 and -9 (MMP). Methods: Twenty-eight cases of mucinous adenomas, LAMNs and adenocarcinomas were included. Immunohistochemistry of MMP-2 and -9 were applied and scored. Results: Overall, the majority of LAMNs were negative by these two markers. Conclusion: LAMNs may not actually have an invasive nature but still they can cause PMxP. These patients should be followed. [ABSTRACT FROM AUTHOR]

Actiomycosis is an uncommon chronic infectious disease. Common sites of involvement include the cervicofacial, thoracic, and abdominopelvic regions. In abdominopelvic actinomycosis, the ileocecal region and appendix are mostly affected. Here, we reported a female patient with limited appendiceal actinomycosis. [ABSTRACT FROM AUTHOR]