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A diagnosis of transient osteoporosis of the hip (TOH) complicated by a pathological displaced subcapital NOF fracture was established. The patient underwent total hip arthroplasty without complication and recovered excellent function after rehabilitation. Awareness of the differential diagnosis of TOH in pregnancy, a high index of suspicion and early MRI to make an early diagnosis and to prevent devastating fracture complications are mandatory.<\/jats:p>","DOI":"10.1136\/bcr-2020-238477","type":"journal-article","created":{"date-parts":[[2021,1,20]],"date-time":"2021-01-20T12:11:32Z","timestamp":1611144692000},"page":"e238477","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":4,"title":["Lower lumbar back pain occurring with transient hip osteoporosis: complication of prolonged suffering and neck of femur fracture in a 24-year-old pregnant patient"],"prefix":"10.1136","volume":"14","author":[{"given":"Karim","family":"Al-Dourobi","sequence":"first","affiliation":[{"name":"Orthopaedic and Trauma Surgery Department, EHC (Ensemble Hospitalier de la C\u00f4te), Morges, Vaud, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jocelyn","family":"Corbaz","sequence":"additional","affiliation":[{"name":"Orthopaedic and Trauma Surgery Department, EHC (Ensemble Hospitalier de la C\u00f4te), Morges, Vaud, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stefan","family":"Bauer","sequence":"additional","affiliation":[{"name":"Orthopaedic and Trauma Surgery Department, EHC (Ensemble Hospitalier de la C\u00f4te), Morges, Vaud, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eric","family":"Ngassom Leumessi","sequence":"additional","affiliation":[{"name":"Orthopaedic and Trauma Surgery Department, EHC (Ensemble Hospitalier de la C\u00f4te), Morges, Vaud, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2021,1,20]]},"reference":[{"doi-asserted-by":"publisher","key":"2025082802274416000_14.1.e238477.1","DOI":"10.1007\/s00402-007-0439-z"},{"key":"2025082802274416000_14.1.e238477.2","doi-asserted-by":"crossref","DOI":"10.1007\/s11657-017-0310-y","article-title":"Pregnancy-associated transient osteoporosis of the hip: results of a case-control study","volume":"12","author":"Hadji","year":"2017","journal-title":"Arch Osteoporos"},{"key":"2025082802274416000_14.1.e238477.3","doi-asserted-by":"crossref","first-page":"1805","DOI":"10.1007\/s00198-017-3952-0","article-title":"Transient osteoporosis of the hip: review of the literature","volume":"28","author":"Asadipooya","year":"2017","journal-title":"Osteoporos Int"},{"key":"2025082802274416000_14.1.e238477.4","first-page":"128","article-title":"Bilateral transient osteoporosis of the hip. 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