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<p>Spondylosis deformans is a chronic degenerative disorder of the vertebral column that has been extensively described in domestic dogs but remains poorly documented in wild canids. The crab-eating fox (<i>Cerdocyon thous</i>) is frequently admitted to wildlife rehabilitation centers, and the characterization of musculoskeletal disorders in this species is particularly relevant given its ecological plasticity and close association with anthropized environments. This report describes a case of spondylosis deformans affecting the lumbar and lumbosacral spine of an adult neutered male <i>Cerdocyon thous</i> maintained under human care, which presented self-mutilation behavior and clinical signs consistent with lumbosacral pain. Three radiographic examinations of the vertebral column were performed in October 2021, October 2024 and January 2026, allowing longitudinal assessment of the lesion progression and stabilization patterns. The initial examination revealed ventral osteophyte formation, narrowing of intervertebral disc spaces, and vertebral endplate sclerosis involving the caudal lumbar vertebrae and the lumbosacral segment. At the follow-up examination, progression of the degenerative changes was evident, characterized by extensive ventral bony proliferation, greater involvement of the lumbosacral region, and further reduction of intervertebral disc spaces. Longitudinal comparison demonstrated a marked increase in both the extent and severity of the lesions over a five-year follow-up period, consistent with the chronic progression of spondylosis deformans. Serial radiography proved to be a valuable tool for the recognition and monitoring of degenerative vertebral disorders and may support clinical management of wild canids under human care.</p>

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Lumbar and lumbosacral spondylosis deformans in a crab-eating fox (Cerdocyon thous): a longitudinal radiographic case

  • 期刊论文

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  • 发表日期：

    2026年3月19日

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  • Fabiane de Holleben Camozzato Fadrique,
  • Eduarda Aléxia Nunes Louzada Dias Cavalcanti,
  • Lorena Eduarda Feitosa Ferrarezi da Silva,
  • Roberto Gumieiro Junior,
  • Guilherme Albuquerque de Oliveira Cavalcanti,
  • Raqueli Teresinha França

摘要

Spondylosis deformans is a chronic degenerative disorder of the vertebral column that has been extensively described in domestic dogs but remains poorly documented in wild canids. The crab-eating fox (Cerdocyon thous) is frequently admitted to wildlife rehabilitation centers, and the characterization of musculoskeletal disorders in this species is particularly relevant given its ecological plasticity and close association with anthropized environments. This report describes a case of spondylosis deformans affecting the lumbar and lumbosacral spine of an adult neutered male Cerdocyon thous maintained under human care, which presented self-mutilation behavior and clinical signs consistent with lumbosacral pain. Three radiographic examinations of the vertebral column were performed in October 2021, October 2024 and January 2026, allowing longitudinal assessment of the lesion progression and stabilization patterns. The initial examination revealed ventral osteophyte formation, narrowing of intervertebral disc spaces, and vertebral endplate sclerosis involving the caudal lumbar vertebrae and the lumbosacral segment. At the follow-up examination, progression of the degenerative changes was evident, characterized by extensive ventral bony proliferation, greater involvement of the lumbosacral region, and further reduction of intervertebral disc spaces. Longitudinal comparison demonstrated a marked increase in both the extent and severity of the lesions over a five-year follow-up period, consistent with the chronic progression of spondylosis deformans. Serial radiography proved to be a valuable tool for the recognition and monitoring of degenerative vertebral disorders and may support clinical management of wild canids under human care.