The most common morphologic design of the spine comprises of 24 presacral mobile segments allocated to 7 non–rib-bearing cervical, 12 ribbearing thoracic, and 5 non-rib-bearing lumbar vertebrae. However, there are significant variations in the number of thoracic and lumbar segments. The authors presented a case of a 65-year-old female with back pain radiating to hips and legs. Plain radiography and magnetic resonance imaging (MRI) of the whole spine revealed fourteen thoracic vertebrae and bilateral ribs, which were found incidentally on preoperative investigation. To the authors’ knowledge, it has never been referenced in the literature.

Keywords: Spine variation; T14 vertebra; Supernumerary thoracic ribs; Transitional vertebra

DOI: doi.org/10.35755/jmedassocthai.2021.10.13041

Received 31 May 2021 | Revised 20 August 2021 | Accepted 20 August 2021