{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,21]],"date-time":"2026-04-21T10:41:11Z","timestamp":1776768071803,"version":"3.51.2"},"reference-count":13,"publisher":"BMJ","issue":"7","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2024,7,20]]},"published-print":{"date-parts":[[2024,7]]},"abstract":"<jats:p>Female Adnexal Tumour of probable Wolffian Origin (FATWO) is a rare gynaecological neoplasm of low malignant potential believed to originate from mesonephric remnants. Its rarity, non-specific presentation, histological heterogeneity and ill-defined radiological features make diagnosing them challenging.<\/jats:p>\n               <jats:p>A female in her 60s presented with history of lower abdominal pain for 2 years. Her gynaecological history was unremarkable, with smooth menopausal transition. Pelvic examination revealed a firm, solid mass in the right adnexa. Imaging was suggestive of a right adnexal mass measuring 6\u00d79\u00d77\u2009cm. She underwent staging laparotomy thereafter. Intraoperatively, an 8\u00d78\u2009cm solid, fibrous mass was noted. Histopathology and immunohistochemistry showed tumour cells with focal gyriform pattern positive for calretinin and WT-1 (Wilms Tumour -1) leading to a diagnosis of FATWO. She was kept on regular follow-up and no manifestations of recurrence were noted. Five years later, she is doing well.<\/jats:p>","DOI":"10.1136\/bcr-2024-261065","type":"journal-article","created":{"date-parts":[[2024,7,30]],"date-time":"2024-07-30T22:41:19Z","timestamp":1722379279000},"page":"e261065","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":4,"title":["Unraveling the enigma: FATWO and its clinicopathologic implications"],"prefix":"10.1136","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-6462-6501","authenticated-orcid":false,"given":"Gaurav","family":"Khastgir","sequence":"first","affiliation":[{"name":"Obstetrics & Gynaecology, Post Graduate Institute of Medical Education & Research (PGIMER), Chandigarh, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5076-6686","authenticated-orcid":false,"given":"Sujata","family":"Siwatch","sequence":"additional","affiliation":[{"name":"Obstetrics & Gynaecology, Post Graduate Institute of Medical Education & Research (PGIMER), Chandigarh, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vanita","family":"Jain","sequence":"additional","affiliation":[{"name":"Obstetrics & Gynaecology, Post Graduate Institute of Medical Education & Research (PGIMER), Chandigarh, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nalini","family":"Gupta","sequence":"additional","affiliation":[{"name":"Cytology & Gynaecological Pathology, Post Graduate Institute of Medical Education & Research (PGIMER), Chandigarh, India"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2024,7,30]]},"reference":[{"key":"2025082710032419000_17.7.e261065.1","doi-asserted-by":"publisher","DOI":"10.1002\/1097-0142(197303)31:3<671::AID-CNCR2820310328>3.0.CO;2-K"},{"key":"2025082710032419000_17.7.e261065.2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2559.1995.tb00623.x"},{"key":"2025082710032419000_17.7.e261065.3","doi-asserted-by":"crossref","first-page":"856","DOI":"10.1016\/S0046-8177(99)90148-X","article-title":"Wolffian adnexal tumor, so-called female adnexal tumor of probable wolffian origin (FATWO)","volume":"30","author":"Devouassoux-Shisheboran","year":"1999","journal-title":"Hum Pathol (N Y)"},{"key":"2025082710032419000_17.7.e261065.4","doi-asserted-by":"crossref","first-page":"1859","DOI":"10.1111\/jog.13704","article-title":"Female adnexal tumor of probable wolffian origin arising from mesosalpinx: a case report and review","volume":"44","author":"Liu","year":"2018","journal-title":"J of Obstet and Gynaecol"},{"key":"2025082710032419000_17.7.e261065.5","doi-asserted-by":"publisher","DOI":"10.1006\/gyno.2002.6739"},{"key":"2025082710032419000_17.7.e261065.6","doi-asserted-by":"crossref","first-page":"575","DOI":"10.1097\/PGP.0000000000000368","article-title":"Female adnexal tumors of probable wolffian origin (FATWO): a case series with next-generation sequencing mutation analysis","volume":"36","author":"Cossu","year":"2017","journal-title":"Int J Gynecol Pathol"},{"key":"2025082710032419000_17.7.e261065.7","doi-asserted-by":"crossref","first-page":"911","DOI":"10.1259\/bjr.72.861.10645202","article-title":"Female adnexal tumour of probable wolffian origin: MR findings","volume":"72","author":"Matsuki","year":"1999","journal-title":"Br J Radiol"},{"key":"2025082710032419000_17.7.e261065.8","doi-asserted-by":"crossref","first-page":"84","DOI":"10.1007\/s00292-015-0128-6","article-title":"Tumor of the mesosalpinx with unclear differentiation","volume":"37","author":"Nann D","year":"2016","journal-title":"Pathol"},{"key":"2025082710032419000_17.7.e261065.9","doi-asserted-by":"publisher","DOI":"10.1046\/j.1365-2559.2001.01086.x"},{"key":"2025082710032419000_17.7.e261065.10","first-page":"645","article-title":"Is female adnexal tumour of probable wolffian origin a benign lesion? 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