+ General Considerations

  • OSA and CSA are the most common scapular tumors
  • Scapular OSA had a similar biologic behaviour to appendicular OSA
  • Telangiectatic OSA of the scapula is associated with the highest rate of metastasis
  • Diagnosis: survey radiographs ± CT
  • 90% of the scapula can be excised with good to excellent function

+ Treatment

  • Partial or total scapulectomy
  • Lateral recumbency with affected thoracic limb uppermost
  • Lateral approach to spine of scapula
  • Trapezius, omotransversarius and rhomboideus muscles dissected close to their origins on the scapula
  • Acromial and spinous heads of deltoideus dissected close to their origins on the scapula
  • Deep dissection started dorsally with lateral retraction of scapula and elevation of serratus ventralis muscle
  • Brachial plexus and axillary artery and vein identified and preserved
  • Coracobrachialis, teres minor, infraspinatus, supraspinatus, and subscapularis tendons are transected at the humerus
  • Teres major and long head of the triceps muscles separated from their insertions on the caudal scapula
  • Osteotomy of glenoid tubercle performed to preserve tendon of origin of the biceps brachialis
  • Scapula removed with attached infraspinatus, supraspinatus, and subscapularis muscles
  • Postoperative chemotherapy is recommended for dogs with scapular OSA