{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,13]],"date-time":"2026-09-13T09:05:19Z","timestamp":1789290319910,"version":"build-2803163510"},"reference-count":0,"publisher":"Indian Orthopaedic Research Group","issue":"8","content-domain":{"domain":["jocr.co.in"],"crossmark-restriction":true},"short-container-title":["Jocr"],"published-print":{"date-parts":[[2026]]},"abstract":"<jats:p>Introduction: Anatomical variations of the navicular bone, including accessory ossicles, hypoplasia, and complete absence, can influence foot biomechanics and clinical presentation. Complete absence of the navicular bone is exceptionally rare and may not be readily recognized.\n\nCase Report: We report a rare case of bilateral navicular agenesis in a 34-year-old male presenting with chronic foot pain and deformity. Imaging revealed a complete absence of the navicular bone with altered midfoot biomechanics and secondary degenerative changes. The patient underwent subtalar arthrodesis with midfoot correction, achieving a stable plantigrade foot. At 12 months follow-up, there was significant pain relief and a satisfactory functional outcome.\n\nConclusion: Navicular agenesis should be considered in atypical cases of flatfoot deformity. Accurate diagnosis using advanced imaging is essential, and surgical management can provide good functional outcomes.\n\nKeywords: Navicular agenesis, flatfoot, subtalar arthrodesis, midfoot deformity, subtalar arthritis, planovalgus deformity, tarsal bone agenesis.<\/jats:p>","DOI":"10.13107\/jocr.2026.v16.i08.7860","type":"journal-article","created":{"date-parts":[[2026,8,7]],"date-time":"2026-08-07T16:20:47Z","timestamp":1786119647000},"page":"255-259","update-policy":"https:\/\/doi.org\/10.13107\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["The Missing Navicular: Bilateral Navicular Agenesis Presenting as Adult-acquired Flatfoot with Subtalar Arthritis: A Case Report"],"prefix":"10.13107","volume":"16","author":[{"given":"Nibras","family":"Chereykkatt","sequence":"first","affiliation":[{"name":"Department of Orthopaedics, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India,"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anirudh","family":"Dwajan","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics, All India Institute of Medical Sciences, Bilaspur, Himachal Pradesh, India,"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kirubakaran","family":"Pattabiraman","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India,"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sanjey","family":"Sivakumar","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India,"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nabiel","family":"Salam","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India,"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Venkataram","family":"Vellaipandi","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics, Mahatma Gandhi Medical College and Research Institute, Puducherry, India."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"5271","published-online":{"date-parts":[[2026]]},"container-title":["Journal of Orthopaedic Case Reports"],"original-title":[],"deposited":{"date-parts":[[2026,9,13]],"date-time":"2026-09-13T08:45:27Z","timestamp":1789289127000},"score":1,"resource":{"primary":{"URL":"https:\/\/jocr.co.in\/wp\/2026\/08\/the-missing-navicular-bilateral-navicular-agenesis-presenting-as-adult-acquired-flatfoot-with-subtalar-arthritis-a-case-report\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026]]},"references-count":0,"journal-issue":{"issue":"8","published-online":{"date-parts":[[2026]]},"published-print":{"date-parts":[[2026]]}},"URL":"https:\/\/doi.org\/10.13107\/jocr.2026.v16.i08.7860","relation":{},"ISSN":["2321-3817"],"issn-type":[{"value":"2321-3817","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026]]},"assertion":[{"value":"Research Article","name":"content_type","label":"Content Type"},{"value":"Yes","name":"crosschecked","label":"CrossChecked"},{"value":"Yes","name":"peer_reviewed","label":"Peer Reviewed"},{"value":"10.13107\/jocr.2026.v16.i08.7860","name":"published","label":"Published"},{"value":"Creative Commons Attribution","name":"license","label":"License","explanation":{"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},"group":{"name":"rights","label":"Rights"}}]}}