Abstract
We present a rare case of synchronous mucinous borderline tumor of the ovary and low-grade appendiceal mucinous neoplasm (LAMN). We performed a left adnexectomy to diagnose the left ovarian borderline malignancy and an ileostomy because of the swollen appendix during the operation. It was diagnosed as left ovarian mucinous borderline malignancy and LAMN. LAMN causes peritoneal dissemination, ovarian metastasis, and peritoneal pseudomyxoma. The appendix and ovary are close to each other anatomically and can metastasize if there is a tumor in either. For ovarian mucinous tumors, it is necessary to search the gastrointestinal tract, especially the appendix, as the primary lesion. For appendix tumors, it is necessary to search for the ovary. Since LAMN may be associated with borderline ovarian malignancies, as in this case, there is a possibility of the duplication of tumors when searching for ovarian mucinous tumors as the primary tumor and if ovarian tumors are found. Since LAMN and mucinous ovarian tumors have similar histological features, immunohistochemical staining is useful for their differentiation because they show different immunostaining patterns.
Highlights
Mucinous borderline ovarian tumors are mild to moderately atypical multilocular cystic tumors containing mucoid material and are the most common of the borderline ovarian tumors
We present a rare case of synchronous mucinous borderline tumor of the ovary and low-grade appendiceal mucinous neoplasm (LAMN)
We report an interesting case of duplicate tumors of ovarian mucinous borderline tumor and LAMN
Summary
Mucinous borderline ovarian tumors are mild to moderately atypical multilocular cystic tumors containing mucoid material and are the most common of the borderline ovarian tumors. Low-grade appendiceal mucinous neoplasm (LAMN) is histologically benign. Koike myxoma peritonei (PMP) and take a clinically malignant course, such as metastasis to the ovaries. Ovarian metastases of LAMN closely resemble mucinous ovarian tumors in appearance and clinically. Treatment of LAMN with ovarian metastases and duplicate tumors of LAMN with primary ovarian tumors commonly undergo surgical resection. We found an appendiceal tumor during surgery for a mucinous borderline ovarian tumor. We suspected ovarian metastasis from the appendiceal tumor or duplicate tumors of the appendix and ovary. We subsequently performed both an adnexectomy and ileostomy. We report an interesting case of duplicate tumors of ovarian mucinous borderline tumor and LAMN
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