Luschka’s tubercle and snapping scapula syndrome: an anatomical and clinical discourse

Abstract

Snapping Scapula Syndrome (SSS) is an uncommon orthopaedic disorder characterised by audible crepitations and disrupted shoulder kinematics due to pathological interactions within the tissues between the scapula and ribcage. One rare cause of SSS is the presence of Luschka’s Tubercle, a bony prominence located on the costal surface of the superior angle of the scapula. Diagnosis of SSS due to Luschka’s Tubercle (LT) can be challenging, often eluding conventional imaging, potentially leading to mismanagement and worsening symptoms. This case series underscores the significance of LT detection, explores its role in SSS, and discusses treatment options. This series presents five patients with posterior shoulder pain and a palpable click indicative of SSS over a six-month period. Three of these patients did not exhibit Luschka’s Tubercle (LT) on 3D CT scans, while the remaining two patients had LT detected on the imaging. Arthroscopic resection successfully resolved symptoms in one of the two patients with LT. SSS is characterised by scapular snapping during movement, often associated with anatomical abnormalities such as Luschka’s Tubercle. A comprehensive approach to diagnosis and management, including imaging, conservative measures, and, when necessary, surgery, is crucial for alleviating symptoms and enhancing shoulder function in affected individuals.