{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,3]],"date-time":"2026-09-03T12:57:30Z","timestamp":1788440250754,"version":"build-2803163510"},"reference-count":23,"publisher":"Japan Surgical Society","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Surg Case Rep"],"published-print":{"date-parts":[[2026]]},"DOI":"10.70352\/scrj.cr.25-0591","type":"journal-article","created":{"date-parts":[[2026,2,20]],"date-time":"2026-02-20T22:09:24Z","timestamp":1771625364000},"page":"n\/a","source":"Crossref","is-referenced-by-count":1,"title":["Intratesticular Fetus in Fetu Arising from an Intra-Abdominal Undescended Right Testis: A Case Report"],"prefix":"10.70352","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3383-1313","authenticated-orcid":false,"given":"Fuminori","family":"Numano","sequence":"first","affiliation":[{"name":"Department of Pediatric Surgery, Yamanashi Prefectural Central Hospital, Kofu, Yamanashi, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Noboru","family":"Oyachi","sequence":"additional","affiliation":[{"name":"Department of Pediatric Surgery, Yamanashi Prefectural Central Hospital, Kofu, Yamanashi, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Satoshi","family":"Shinohara","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Yamanashi Prefectural Central Hospital, Kofu, Yamanashi, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rei","family":"Sunami","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Yamanashi Prefectural Central Hospital, Kofu, Yamanashi, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"51119","reference":[{"key":"1","doi-asserted-by":"crossref","unstructured":"1) Chua JHA, Chui CH, Sai Prasad TR, et al. Fetus-in-fetu in the pelvis: report of a case and literature review. Ann Acad Med Singap 2005; 34: 646\u20139.","DOI":"10.47102\/annals-acadmedsg.V34N10p646"},{"key":"2","doi-asserted-by":"crossref","unstructured":"2) Ji Y, Song B, Chen S, et al. Fetus in fetu in the scrotal sac: case report and literature review. Medicine (Baltimore) 2015; 94: e1322.","DOI":"10.1097\/MD.0000000000001322"},{"key":"3","doi-asserted-by":"crossref","unstructured":"3) Palo S, Mangla M, Gabbeta S, et al. Demystifying fetus-in-fetu: a systematic review of its clinical and pathological attributes. J Indian Assoc Pediatr Surg 2024; 29: 406\u201316.","DOI":"10.4103\/jiaps.jiaps_67_24"},{"key":"4","unstructured":"4) Rahman GA, Abdulkadir A, Abdur-Rahman LO. Fetus-in fetu: a review article. Eur J Sci Res 2007; 18: 663\u201373."},{"key":"5","unstructured":"5) Sinha S, Sarin YK, Khurana N. Prenatally diagnosed retroperitoneal fetus-in-fetu with ipsilateral testicular atrophy: a case report. J Neonatal Surg 2012; 1: 41."},{"key":"6","doi-asserted-by":"crossref","unstructured":"6) Cingel V, Durdik S, Babala J, et al. Fetus <i>in fetu<\/i> from newborn\u2019s mediastinum: case report and a review of literature. Surg Radiol Anat 2012; 34: 197\u2013202.","DOI":"10.1007\/s00276-011-0868-9"},{"key":"7","doi-asserted-by":"crossref","unstructured":"7) Qin X, Chen X, Zhao X, et al. Intracranial parasitic fetus in a living infant: a case study with surgical intervention and prognosis analysis. Am J Case Rep 2024; 25: e944371.","DOI":"10.12659\/AJCR.944371"},{"key":"8","doi-asserted-by":"crossref","unstructured":"8) Hopkins KL, Dickson PK, Ball TI, et al. Fetus-in-fetu with malignant recurrence. J Pediatr Surg 1997; 32: 1476\u20139.","DOI":"10.1016\/S0022-3468(97)90567-4"},{"key":"9","doi-asserted-by":"crossref","unstructured":"9) Mills P, Bornick PW, Morales WJ, et al. Ultrasound prenatal diagnosis of fetus <i>in fetu<\/i>. Ultrasound Obstet Gynecol 2001; 18: 69\u201371.","DOI":"10.1046\/j.1469-0705.2001.00469.x"},{"key":"10","doi-asserted-by":"crossref","unstructured":"10) Krishnan V, Belle P, Gonzalez D, et al. Fetus-in-fetu: a case of ovarian involvement and residual regrowth in a teenager. J Pediatr Adolesc Gynecol 2021; 34: 882\u20134.","DOI":"10.1016\/j.jpag.2021.07.010"},{"key":"11","doi-asserted-by":"crossref","unstructured":"11) Shin JH, Yoon CH, Cho KS, et al. Fetus-in-fetu in the scrotal sac of a newborn infant: imaging, surgical and pathological findings. Eur Radiol 1999; 9: 945\u20137.","DOI":"10.1007\/s003300050773"},{"key":"12","doi-asserted-by":"crossref","unstructured":"12) Willis RA. The structure of teratomata. J Pathol Bacteriol 1935; 40: 1\u201336.","DOI":"10.1002\/path.1700400102"},{"key":"13","doi-asserted-by":"crossref","unstructured":"13) Lord JM. Intra-abdominal f\u0153tus in f\u0153tu. J Pathol Bacteriol 1956; 72: 627\u201341.","DOI":"10.1002\/path.1700720230"},{"key":"14","doi-asserted-by":"crossref","unstructured":"14) Gross RE, Clatworthy HW Jr. Twin fetuses in fetu. J Pediatr 1951; 38: 502\u20138.","DOI":"10.1016\/S0022-3476(51)80037-4"},{"key":"15","doi-asserted-by":"crossref","unstructured":"15) Federici S, Ceccarelli PL, Ferrari M, et al. Fetus in fetu: report of three cases and review of the literature. Pediatr Surg Int 1991; 6: 60\u20135.","DOI":"10.1007\/BF00174889"},{"key":"16","doi-asserted-by":"crossref","unstructured":"16) Eng HL, Chuang JH, Lee TY, et al. Fetus in fetu: a case report and review of the literature. J Pediatr Surg 1989; 24: 296\u20139.","DOI":"10.1016\/S0022-3468(89)80017-X"},{"key":"17","unstructured":"17) Chateil JF, Diard F, Bondonny JM, et al. Intraperitoneal testicular fetus in fetu (in French). Pediatrie 1990; 45: 255\u20137."},{"key":"18","doi-asserted-by":"crossref","unstructured":"18) Kakizoe T, Tahara M. Fetus in fetu located in the scrotal sac of a newborn infant: a case report. J Urol 1972; 107: 506\u20138.","DOI":"10.1016\/S0022-5347(17)61064-4"},{"key":"19","doi-asserted-by":"crossref","unstructured":"19) Alpers CE, Harrison MR. Fetus in fetu associated with an undescended testis. Pediatr Pathol 1985; 4: 37\u201346.","DOI":"10.3109\/15513818509025901"},{"key":"20","doi-asserted-by":"crossref","unstructured":"20) Landmann A, Calisto JL, Reyes-M\u00fagica M, et al. Fetus-in-fetu presenting as a cryptorchid testis and abdominal mass: a report of a case and review of the literature. J Pediatr Surg Case Rep 2016; 13: 38\u201340.","DOI":"10.1016\/j.epsc.2016.07.010"},{"key":"21","doi-asserted-by":"crossref","unstructured":"21) Khope S, Phaldesai N, Borkar J, et al. Fetus in fetu in the scrotal sac of newborn. Ann Pediatr Surg 2016; 12: 68\u201370.","DOI":"10.1097\/01.XPS.0000481340.83228.54"},{"key":"22","doi-asserted-by":"crossref","unstructured":"22) Heitman EA, Thomas JC, Maller VV, et al. Scrotal fetus in fetu in a newborn: a rare case report. Urology 2022; 166: 241\u20135.","DOI":"10.1016\/j.urology.2022.05.016"},{"key":"23","doi-asserted-by":"crossref","unstructured":"23) Luo M, Li G, Gao H, et al. An infant with testicular fetus-in-fetu in the abdominal cavity: rare case report. Front Pediatr 2024; 12: 1442034.","DOI":"10.3389\/fped.2024.1442034"}],"container-title":["Surgical Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.jstage.jst.go.jp\/article\/scrj\/12\/1\/12_cr.25-0591\/_pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,2,21]],"date-time":"2026-02-21T05:04:34Z","timestamp":1771650274000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.jstage.jst.go.jp\/article\/scrj\/12\/1\/12_cr.25-0591\/_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026]]},"references-count":23,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2026]]}},"URL":"https:\/\/doi.org\/10.70352\/scrj.cr.25-0591","relation":{},"ISSN":["2198-7793"],"issn-type":[{"value":"2198-7793","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026]]},"article-number":"cr.25-0591"}}