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Lawler D, Tangredi B, Becker J, Widga C, Etnier M, Martin T, Schulz K, Kohn L. The nature of coxofemoral joint pathology across family Canidae. Anat Rec (Hoboken) 2021; 305:2119-2136. [PMID: 34837349 DOI: 10.1002/ar.24846] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 11/12/2021] [Accepted: 11/16/2021] [Indexed: 01/26/2023]
Abstract
We evaluated coxofemoral joints from museum specimens of: Vulpes lagopus; Vulpes vulpes; Vulpes velox; Nyctereutes procyonoides; Urocyon cinereoargenteus; Aenocyon [Canis] dirus; Canis latrans; Canis lupus lupus; Canis lupus familiaris; C. l. familiaris × latrans; and Canis dingo. Acetabular components included: fossa; articular surface; medial and lateral articular margins; and periarticular surfaces. Acetabular components variably revealed: osteophyte-like features; varying appearance of articular margin rims (especially contour changes); rough bone surfaces (especially fossa and articular surface); and surface wear. Proximal femoral components included: articular surface; articular margin; periarticular surfaces; and joint capsule attachment. Femoral components variably revealed: rough bone surface; bone loss; articular margin osteophyte-like features; caudal post-developmental mineralized prominence; and enthesophytes along the joint capsule attachment. Non-metric multidimensional scaling was used to analyze right-left asymmetric relationships between observed traits, across taxa. Significantly different acetabular trait asymmetry involved only C. latrans-C. l. familiaris; V. vulpes-N. procyonoides, and U. cinereoargenteus-N. procyonoides. There were no significant lateralized differences in proximal femoral traits involving modern canids, ancient and modern C. l. familiaris, or modern vulpines. Thus, the observations were strongly bilateral. We hypothesized high similarity of traits across taxa. The data confirm the hypothesis and strongly suggest broad and deep morphological and mechanistic conservation that almost certainly pre-existed (at least) all modern canids. Further zoological studies are needed to evaluate phylogenic implications in greater detail.
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Affiliation(s)
- Dennis Lawler
- Center for American Archaeology, Kampsville, Illinois, USA.,Pacific Marine Mammal Center, Laguna Beach, California, USA.,Department of Landscape History, Illinois State Museum, Springfield, Illinois, USA
| | - Basil Tangredi
- Pacific Marine Mammal Center, Laguna Beach, California, USA.,Green Mountain College, Poultney, Vermont, USA.,Vermont Institute of Natural Sciences, Quechee, Vermont, USA
| | - Julia Becker
- Tippecanoe Animal Hospital, Lafayette, Indiana, USA
| | - Christopher Widga
- Don Sunquist Center for Excellence in Paleontology, East Tennessee State University, Gray, Tennessee, USA
| | - Michael Etnier
- Department of Anthropology, Western Washington University, Bellingham, Washington, USA
| | - Terrance Martin
- Department of Landscape History, Illinois State Museum, Springfield, Illinois, USA
| | - Kurt Schulz
- Department of Biological Sciences, Southern Illinois University, Edwardsville, Illinois, USA
| | - Luci Kohn
- Department of Biological Sciences, Southern Illinois University, Edwardsville, Illinois, USA
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Mineralization of the transverse ligament of the atlas causing compressive radiculopathy. Vet Comp Orthop Traumatol 2017; 29:253-8. [DOI: 10.3415/vcot-15-09-0161] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Accepted: 01/03/2016] [Indexed: 11/17/2022]
Abstract
Summary
Objective: To describe a case of a Boxer dog with radiculopathy due to mineralization of the transverse ligament of the atlas and subsequent resorption and resolution of clinical signs after atlantoaxial arthrodesis and odontoidectomy.
Case Report: A five-year-old neutered female Boxer dog was presented with a four-month history of cervical hyperaesthesia refractory to medical management. Neurological examination and magnetic resonance imaging indicated a diagnosis of radiculopathy due to cervical nerve root impingement by dystrophic mineralization of the transverse ligament of the atlas. Odontoidectomy was performed by a ventral approach and atlantoaxial arthrodesis was achieved with a ventral composite polymethylmethacrylate and pin fixation.
Results: Atlantoaxial arthrodesis and progressive resorption of the mineralization following stabilization facilitated indirect decompression. The radioclinical diagnosis and response to arthrodesis was considered ana -logous to retro-odontoid pannus in the human.
Clinical relevance: A clinical condition similar to retro-odontoid pannus may exist in the canine and may be amenable to atlantoaxial arthrodesis.
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