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When such injuries result from minimal trauma, they demand careful evaluation of skeletal integrity. This case highlights how social withdrawal, prolonged immobilization, and malnutrition can lead to reversible bone fragility and an unusual fracture pattern in a young patient.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Case presentation<\/jats:title>\n                    <jats:p>A 14-year-old boy of Danish ethnicity with no prior somatic disease sustained an intertrochanteric femur fracture after falling from a floor bed of approximately one meter.<\/jats:p>\n                    <jats:p>For the preceding two years, he had been socially withdrawn and largely bedridden. Profound malnutrition, vitamin D deficiency, secondary hyperparathyroidism, and markedly reduced bone quality\u00a0were evident. Intraoperative findings confirmed cortical thinning and brittle bone structure inconsistent with chronological age. The patient was treated with surgical fracture\u00a0fixation using a pediatric dynamic hip screw in combination with vitamin D and calcium supplementation, calorie-dense nutrition, physiotherapy, and social support. The fracture healed, and over eight months he regained mobility, caught up on body weight and growth, and improved in\u00a0developmental parameters.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Low-energy hip fractures in adolescents are rare but may indicate reversible bone fragility from unloading and malnutrition; early multidisciplinary interventions are warranted.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s13256-026-06258-7","type":"journal-article","created":{"date-parts":[[2026,7,9]],"date-time":"2026-07-09T13:04:06Z","timestamp":1783602246000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Low-energy hip fracture in a socially withdrawn and physically inactive teenager highlighting the age-independent role of mechanical loading and nutrition: a case report"],"prefix":"10.1186","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-4097-9833","authenticated-orcid":false,"given":"Muhammed","family":"Cetinkaya","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4286-1533","authenticated-orcid":false,"given":"Mathias","family":"Mejdahl","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-8127-2304","authenticated-orcid":false,"given":"Julius","family":"Kr\u00fcger","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3135-7435","authenticated-orcid":false,"given":"Dennis","family":"Karimi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0727-4680","authenticated-orcid":false,"given":"Tobias","family":"Winkler","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2924-7384","authenticated-orcid":false,"given":"Tazio","family":"Maleitzke","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,7,9]]},"reference":[{"issue":"2","key":"6258_CR1","doi-asserted-by":"publisher","first-page":"529","DOI":"10.1016\/j.jor.2018.03.039","volume":"15","author":"BL Dial","year":"2018","unstructured":"Dial BL, Lark RK. 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This case report did not require approval by an ethics committee according to national regulations, as it describes a single patient. The patient\u2019s parents gave written and verbal consent for publication of this case report and any accompanying images. A copy of the\u00a0written consent is available for review by the Editor-in-Chief of this journal.\u00a0","order":1,"name":"Ethics","label":"Ethics approval and consent to participate\u00a0and for\u00a0publication","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The authors declare that they have no competing interests.","order":2,"name":"Ethics","label":"Competing interests","group":{"name":"EthicsHeading","label":"Declarations"}}],"article-number":"403"}}