A case with double vena cava superior discovered during the investigating of persistent cough.

A 31-year-old non-smoking man presented with a 2 month history of dry cough, rhinorrhea and postnasal drip. He had been seen at an Otorhinolaryngology clinic which prescribed standard sinusitis therapy. Due to lack of relief, he then presented to our clinic. The patient had no symptoms related to other systems. His vital signs were normal and physical examination was unremarkable. Basic laboratory tests were normal, as were his spirometry results. The chest X-ray was normal.