Ventral scapular osteochondroma excision through ‘triangle of auscultation’: A case series

Abstract

Introduction: Surgical intervention through the ‘triangle of auscultation’ is less morbid to patients, as it is devoid of muscles and provides an easy access to tumours arising on the ventral aspect of scapula especially near inferior angle. Method: Three patients presented to us with pseudo-winging of scapula and an audible thud on abduction of the arm. A bony mass, painful in two and painless in one patient, was palpable along the anterior aspect of the inferior angle of scapula. A clinical diagnosis of osteochondroma was made which was corroborated by X-rays and computed tomography (CT) imaging. Ventral scapular osteochondroma excision is challenging due to multiple muscle attachments, requiring extensive soft tissue dissection and muscular release. Numerous blood vessels and nerves in the vicinity may also add to the degree of difficulty. This necessitates the need of a minimally invasive and muscle-sparing procedure. We hereby describe a novel surgical approach to the ventral aspect of scapula through the triangle of auscultation for excision of scapular osteochondroma. Results: Pseudo-winging disappeared following surgery. Snapping of the scapula resolved with early, full shoulder range of motion. Quick disabilities of arm, shoulder and hand (DASH) score improved from mean 20.2 preoperatively to 0 postoperatively at 3 months in all the patients. Conclusion: The approach is simple with minimal blood loss as it does not involve splitting or cutting of trapezius, rhomboid major or subscapularis muscles.