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Case report 622. Multiple cartilaginous exostoses.

S K Liu1, C Thacher

  • 1Animal Medical Center, New York, New York 10021.

Skeletal Radiology
|January 1, 1990
PubMed
Summary
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Multiple cartilaginous exostoses, a rare bone condition, were identified in a young Scottish terrier. This led to neurological deficits, highlighting the potential severity of this skeletal disorder in dogs.

Area of Science:

  • Veterinary Pathology
  • Skeletal Biology
  • Canine Oncology

Background:

  • Multiple cartilaginous exostoses (MCE) are benign bone tumors characterized by the formation of cartilage-capped bone spurs.
  • While common in humans, MCE is less frequently reported in veterinary medicine, particularly in young animals.

Observation:

  • A 3-month-old female Scottish terrier presented with multiple MCE affecting appendicular and axial skeleton, including metatarsals, phalanges, scapula, ribs, and vertebrae.
  • Radiographs revealed expansile, circumscribed bone lesions consistent with MCE.
  • The dog subsequently developed progressive neurological deficits attributed to extradural spinal cord compression.

Findings:

  • Histopathological examination of affected bone revealed characteristic features of MCE, including a hyaline cartilage cap and abnormal endochondral ossification.

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  • Autopsy confirmed widespread MCE with a smooth, undulating cartilage surface on affected bones.
  • The observed lesions suggest a potential hereditary component and raise concerns for malignant transformation.

    • Implications:

    • This case underscores the importance of recognizing MCE in young dogs and its potential for causing significant morbidity due to secondary complications like neurological impairment.
    • Further investigation into the genetic basis and malignant potential of MCE in canines is warranted.
    • Accurate diagnosis and understanding of MCE progression are crucial for appropriate case management and prognosis in veterinary patients.