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Laboratory investigations pointed in favour of bone mineral disease, and histopathological examination of the bone narrowed it down to Paget\u2019s disease. The fracture was fixed with a contralateral distal femur locking compression plate. The fracture site failed to show signs of union until 6 months postsurgery and hence the patient was advised for grafting procedure. The patient deferred surgery and remains without major complications until 18 months of follow-up.<\/jats:p>","DOI":"10.1136\/bcr-2020-238567","type":"journal-article","created":{"date-parts":[[2020,12,22]],"date-time":"2020-12-22T18:18:21Z","timestamp":1608661101000},"page":"e238567","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["\u2018Bone within bone appearance\u2019 in a pathological fracture"],"prefix":"10.1136","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7143-4354","authenticated-orcid":false,"given":"Sathish","family":"Muthu","sequence":"first","affiliation":[{"name":"Velayuthampalayam Government Hospital, Velayuthampalayam, Tamil Nadu, India"},{"name":"Orthopaedic Research Group, Coimbatore, Tamil Nadu, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eswar","family":"Ramakrishnan","sequence":"additional","affiliation":[{"name":"Orthopaedic Research Group, Coimbatore, Tamil Nadu, India"},{"name":"Institute of Orthopaedics and Traumatology, Madras Medical College, Chennai, Tamil Nadu, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Girinivasan","family":"Chellamuthu","sequence":"additional","affiliation":[{"name":"Orthopaedic Research Group, Coimbatore, Tamil Nadu, India"},{"name":"Department of Orthopaedic Surgery, Ganga Medical Centre and Hospitals, Coimbatore, Tamil Nadu, India"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2020,12,21]]},"reference":[{"unstructured":"Kanis JA . 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