Bilateral angular carpal deformity in a dog with craniomandibular osteopathy

Abstract

A four-month-old West Highland White Terrier was presented to the Small Animal Teaching Hospital at the University of Liverpool with the complaint of a bilateral angular carpal deformity. A 20° valgus deformity was present in both thoracic limbs, centred on the distal radial physes. Both distal ulnas were grossly thickened and there was concomitant thickening of the rostral mandible and calvarium. The dog exhibited signs of resentment on palpation of the mandible and signs of pain were elicited on flexion and extension of both elbow joints. No signs of pain were evident on palpation of the ulnas or calvarium. Radiographic images of both ulnas showed marked amorphous periosteal new bone formation. The distal ulnar physes were closed centrally and both elbow joints had humeroulnar subluxation. Radiographic changes to the calvarium and mandibular rami were consistent with a diagnosis of craniomandibular osteopathy. A bilateral ulna ostectomy was performed to correct the angular limb deformity and elbow subluxations. Histology of the ostectomised pieces showed changes consistent with craniomandibular osteopathy.

Description of a novel distribution and subsequent resolution of severe, bilateral thoracic limb and cervical vertebral abnormalities in a dog with craniomandibular osteopathy

“…13 14 The distinctive feature of this case, when compared with those seen in the previous literature, is the novel distribution of periosteal reaction in the cervical spine. In standard cases of CMO, a presumptive diagnosis of CMO can often be made based on lateral and ventrodorsal radiographical views, illustrating symmetrically pathognomonic enlarged mandibular bodies due to dense osseous proliferation, [2][3][4] with both the mandibles and tympanic bulla/petrous temporal areas involved in about 50 per cent of cases. 15 Challengingly, changes can be confined to the frontal, parietal and occipital bones, and occasionally the condition extends to the metaphysis of long bones, in particular the femur, radius and ulna.…”

“…2 It is characterised by an irregular new bone formation that is non-neoplastic and bilaterally symmetrical. [1][2][3] The most frequently affected bones are the mandibular rami, occipital bone and tympanic bulla of the temporal bone. Occasionally, CMO can extend to the metaphyses of long bones, particularly the femur, radius and ulna.…”

Osteopatía craneomandibular en un perro American Bully de siete meses de edad

“…De manera simultánea, se evidencia formación intermitente de hueso trabecular. Estos cambios dan una imagen en mosaico, en la que el hueso nuevo aparece separado del hueso maduro por unas líneas de compactación, alternancia de tejidos que resulta finalmente en el engrosamiento de las regiones óseas afectadas (Thompson et al, 2011;Pettitt et al, 2012;Beever et al, 2018).…”