Synostosis of First and Second Rib: A Case Report

Akshay G. Prajapati | Dipali J. Trivedi | Mihir Sharma ^[2] | Vihangi Parekh ^[2]

Abstract: Background: Congenital anomalies of the ribs are rare and they are usually discovered as an incidental finding during routine radiography. Bicipital rib results due to fusion of cervical rib with the first rib or the first rib with the second rib. Its occurrence is not uncommon and more frequently unilateral. Case Description: During routine osteology teaching in the Department of Anatomy, B. J. Medical college, Ahmedabad; it has been observed that one of the first rib was fused with the superior surface of the second rib on the left side, 2.5 cm from the tubercle of first rib obliterating the first intercostal space. Conclusion: Involvement of 1st rib is one of the causes of thoracic outlet syndrome. A rib anomaly usually indicates an underlying systemic disease and might need surgical intervention. Precise knowledge and awareness of such anomalies is important for anatomists, clinicians, thoracic surgeons and radiologists.

Keywords: Synostosis of ribs, Bicipital rib, Fusion of ribs, Thoracic outlet syndrome

Edition: Volume 12 Issue 1, January 2023,

Pages: 609 - 610