{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T11:41:27Z","timestamp":1760010087085,"version":"build-2065373602"},"reference-count":10,"publisher":"BMJ","issue":"10","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2025,9,9]]},"published-print":{"date-parts":[[2025,10]]},"abstract":"<jats:p>Solitary, benign retroperitoneal neurofibromas are exceedingly rare. Our case report highlights a man who presented with left-sided abdominal pain and left lower extremity numbness and weakness. On cross-sectional imaging, a 12.1 cm \u00d7 9.8\u2009cm \u00d7 7.5\u2009cm lobulated, well-marginated mass emanating from the left iliopsoas muscle at the level of the pelvic rim was visualised. A tissue biopsy suggested the diagnosis of a neurofibroma. The patient underwent resection of a femoral nerve sheath tumor, which resulted in femoral nerve palsy. Subsequent distal reconstructive surgeries and physical therapy resulted in improvement of his postoperative deficits. This is a highly rare case of a giant retroperitoneal solitary neurofibroma of the femoral nerve sheath diagnosed in a young patient.<\/jats:p>","DOI":"10.1136\/bcr-2024-263606","type":"journal-article","created":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T11:10:19Z","timestamp":1760008219000},"page":"e263606","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Giant retroperitoneal solitary neurofibroma"],"prefix":"10.1136","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-7586-508X","authenticated-orcid":false,"given":"Katie Francine","family":"Lee","sequence":"first","affiliation":[{"name":"General Surgery, Walter Reed National Military Medical Center, Bethesda, Maryland, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1132-4559","authenticated-orcid":false,"given":"Rathnayaka Mudiyanselage Kalpanee D","family":"Gunasingha","sequence":"additional","affiliation":[{"name":"General Surgery, Womack Army Medical Center, Fort Liberty, North Carolina, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jonathan","family":"Keung","sequence":"additional","affiliation":[{"name":"Fairfax Radiology Centers LLC, Fairfax, Virginia, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Benjamin","family":"Potter","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Penn Medicine, Philadelphia, Pennsylvania, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ross","family":"Puffer","sequence":"additional","affiliation":[{"name":"Neurosurgery, Walter Reed National Military Medical Center, Bethesda, Maryland, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michele","family":"Gage","sequence":"additional","affiliation":[{"name":"Surgical Oncology, Walter Reed National Military Medical Center, Bethesda, Maryland, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2025,10,9]]},"reference":[{"key":"2025100904100955000_18.10.e263606.1","doi-asserted-by":"crossref","DOI":"10.1016\/j.sipas.2021.100032","article-title":"Surgical approaches for retroperitoneal tumors.","volume":"5","author":"Ronellenfitsch","year":"2021","journal-title":"Surg Pract Sc"},{"key":"2025100904100955000_18.10.e263606.2","doi-asserted-by":"crossref","first-page":"1887","DOI":"10.1007\/s00261-014-0311-x","article-title":"Primary retroperitoneal masses: what is the differential diagnosis?","volume":"40","author":"Scali","year":"2015","journal-title":"Abdom Imaging"},{"key":"2025100904100955000_18.10.e263606.3","unstructured":"Ikoma N , Roland C , Feig B . SOFT-tissue sarcomas. In: The MD anderson surgical oncology handbook. 6th edn. Lippincott Williams & Wilkins, 2019. Available: https:\/\/www-r2library-com.usu01.idm.oclc.org\/resource\/detail\/1496358155\/ch0005s0174"},{"key":"2025100904100955000_18.10.e263606.4","doi-asserted-by":"publisher","DOI":"10.2214\/ajr.164.2.7839977"},{"key":"2025100904100955000_18.10.e263606.5","unstructured":"Goyal A , Mahan M , Mankier A , et al . Benign and malignant tumors of the peripheral nerve. In: Youmans and winn neurological surgery. 8th edn. Elsevier, 2023: 2208\u201322. Available: https:\/\/www-clinicalkey-com.wrnmmc.idm.oclc.org\/#!\/content\/book\/3-s2.0-B9780323661928002858?scrollTo=%23hl0001388"},{"key":"2025100904100955000_18.10.e263606.6","doi-asserted-by":"crossref","first-page":"e54","DOI":"10.1308\/rcsann.2021.0101","article-title":"Giant retroperitoneal liposarcoma surgical management","volume":"104","author":"Herrera-Almario","year":"2022","journal-title":"Ann R Coll Surg Engl"},{"key":"2025100904100955000_18.10.e263606.7","first-page":"303","article-title":"Giant retroperitoneal sarcomas","volume":"48","author":"Iano\u015fi","year":"2007","journal-title":"Rom J Morphol Embryol"},{"key":"2025100904100955000_18.10.e263606.8","doi-asserted-by":"crossref","DOI":"10.3390\/cancers14174091","article-title":"Surgical Principles of Primary Retroperitoneal Sarcoma in the Era of Personalized Treatment: A Review of the Frontline Extended Surgery","volume":"14","author":"Munoz","year":"2022","journal-title":"Cancers (Basel)"},{"key":"2025100904100955000_18.10.e263606.9","doi-asserted-by":"crossref","DOI":"10.3389\/fsurg.2021.642451","article-title":"Primary Retroperitoneal Ganglioneuroma: A Retrospective Cohort Study of 32 Patients","volume":"8","author":"Xiao","year":"2021","journal-title":"Front Surg"},{"key":"2025100904100955000_18.10.e263606.10","doi-asserted-by":"crossref","first-page":"199","DOI":"10.1007\/s00423-019-01851-5","article-title":"Interdisciplinary approach allows minimally invasive, nerve-sparing removal of retroperitoneal peripheral nerve sheath tumors","volume":"405","author":"Hajiabadi","year":"2020","journal-title":"Langenbecks Arch Surg"}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-2024-263606","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T11:10:21Z","timestamp":1760008221000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-2024-263606"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,10]]},"references-count":10,"journal-issue":{"issue":"10","published-online":{"date-parts":[[2025,10,9]]},"published-print":{"date-parts":[[2025,10]]}},"alternative-id":["10.1136\/bcr-2024-263606"],"URL":"https:\/\/doi.org\/10.1136\/bcr-2024-263606","relation":{},"ISSN":["1757-790X"],"issn-type":[{"value":"1757-790X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,10]]}}}