Congestive heart failure is the leading cause of pleural effusion in the north-west of Iran

Introduction: Pleural effusion (PE) is a common manifestation of pulmonary and non-pulmonary diseases, and the first step for diagnosing the etiology is analysis of pleural fluid. The aim of this study was to determine the epidemiology of PE in a tertiary referral hospital in the North-West of Iran. Methods: All patients with PE who referred to the department of pulmonary diseases in tertiary centre of Tabriz University of Medical Sciences...