Four accessory (supernumerary) intrathoracic ribs: a case report.

Accessory (supernumerary) intrathoracic ribs are a very rare congenital disorder. Here, we present the first case of multiple supernumerary intrathoracic ribs in an adult, which are present consecutively between ribs 1 and 4 and without articulation with the vertebrae. Despite this, anatomical variation is usually silent and accidentally discovered; its knowledge can prevent confusion with other structures during imaging diagnostic techniques of thoracic pathologies.