Common trunk of the posterior intercostal arteries from the thoracic aorta: anatomical variation, frequency, and importance in individuals

Purpose A common trunk of the posterior intercostal arteries originating from the descending thoracic aorta is normally an anatomical variation. A search through the literature disclosed the frequencies of common trunks variations among population, but no information relates to particular topic of simultaneous multiple common trunks of the PIA present in individuals.