ISSN 1308-8734 | E-ISSN 1308-8742
Case Report
Expansion of the Rib Head: A Novel Computed Tomographic Feature of Supernumerary Intrathoracic Ribs
1 Department of Radiology, Erzurum Regional Training and Research Hospital, Erzurum, Turkey  
2 Department of Radiology, Koç University School of Medicine, İstanbul, Turkey  
3 Department of Radiology, Hacettepe University School of Medicine, Ankara, Turkey  
Eurasian J Med 2017; 49: 64-65
DOI: 10.5152/eurasianjmed.2017.17004
Key Words: Intrathoracic rib, supernumerary, expansion of rib head, computed tomography, congenital anomaly

Intrathoracic ribs are very rare congenital anomalies. Approximately 50 cases have been reported in the literature till date. They are usually present on the right side, between the third and eighth ribs without sex predominance. They may originate from a vertebral body or the proximal or distal part of a rib. In most cases, they are asymptomatic, but they may be associated with developmental abnormalities of ribs and vertebrae. The diagnosis is important to prevent further investigation or intervention. Here we present two rare cases with supernumerary intrathoracic rib and describe a novel sign, namely expansion of the rib head. To the best of our knowledge, this is the shortest supernumerary intrathoracic rib, reported in the literature, on the left side originating from the head of the second rib, which could have been misdiagnosed as osteochondroma due to its atypical features.

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