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In the present case, we laparoscopically removed a LAMN encountered during risk\u2010reducing salpingo\u2010oophorectomy (RRSO). The patient was a 53\u2010year\u2010old woman who was diagnosed with hereditary breast and ovarian cancer syndrome. RRSO was planned, and magnetic resonance imaging revealed a large cystic tumor in the right lower abdomen. We expected an ovarian cyst; however, it was a primary tumor of the appendix. Partial cecal resection was performed laparoscopically by a surgical oncologist. The pathological diagnosis was LAMN. Gynecologists may encounter this disease incidentally. Mucinous appendiceal neoplasm (MAN) may be encountered during RRSO. If a right lower abdominal mass is found near a normal ovary preoperatively, gynecologists should consider MAN as well as paraovarian cyst.<\/jats:p>","DOI":"10.1111\/jog.15802","type":"journal-article","created":{"date-parts":[[2023,9,29]],"date-time":"2023-09-29T05:03:16Z","timestamp":1695963796000},"page":"2975-2978","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Low\u2010grade appendiceal mucinous neoplasm encountered during risk\u2010reducing salpingo\u2010oophorectomy: A case of laparoscopic surgery"],"prefix":"10.1111","volume":"49","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2606-2950","authenticated-orcid":false,"given":"Katsuyuki","family":"Konnai","sequence":"first","affiliation":[{"name":"Department of Gynecology Kanagawa Cancer Center  Kanagawa Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroyuki","family":"Fujiwara","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Jichi Medical University  Tochigi Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masakazu","family":"Kitagawa","sequence":"additional","affiliation":[{"name":"Department of Gynecology Kanagawa Cancer Center  Kanagawa Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Reina","family":"Wakabayashi","sequence":"additional","affiliation":[{"name":"Department of Gynecology Kanagawa Cancer Center  Kanagawa Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ryo","family":"Onose","sequence":"additional","affiliation":[{"name":"Department of Gynecology Kanagawa Cancer Center  Kanagawa Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hisamori","family":"Kato","sequence":"additional","affiliation":[{"name":"Department of Gynecology Kanagawa Cancer Center  Kanagawa Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2023,9,28]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1245\/s10434-018-6488-4"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ejso.2007.04.002"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1001\/archsurg.138.6.585"},{"issue":"2","key":"e_1_2_7_5_1","first-page":"837","article-title":"Low\u2010grade appendiceal mucinous neoplasm mimicking an adnexal mass","volume":"56","author":"Cristian DA","year":"2015","journal-title":"Romanian J Morphol Embryol"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.2214\/AJR.12.9260"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1200\/JCO.21.02112"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1001\/jamaoncol.2022.0476"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.1002\/bjs.11603"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1093\/jnci\/djy148"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1093\/jnci\/djz012"},{"key":"e_1_2_7_12_1","doi-asserted-by":"publisher","DOI":"10.1001\/jamasurg.2013.1006"},{"key":"e_1_2_7_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/S1470-2045(05)70539-8"},{"key":"e_1_2_7_14_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00464-018-6182-4"},{"key":"e_1_2_7_15_1","doi-asserted-by":"publisher","DOI":"10.1007\/s13691-017-0285-y"}],"container-title":["Journal of Obstetrics and Gynaecology Research"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/jog.15802","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,12,19]],"date-time":"2023-12-19T02:07:59Z","timestamp":1702951679000},"score":1,"resource":{"primary":{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/10.1111\/jog.15802"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,9,28]]},"references-count":14,"journal-issue":{"issue":"12","published-print":{"date-parts":[[2023,12]]}},"alternative-id":["10.1111\/jog.15802"],"URL":"https:\/\/doi.org\/10.1111\/jog.15802","archive":["Portico"],"relation":{},"ISSN":["1341-8076","1447-0756"],"issn-type":[{"value":"1341-8076","type":"print"},{"value":"1447-0756","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,9,28]]},"assertion":[{"value":"2023-02-08","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2023-09-19","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2023-09-28","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}