“…PCT levels increase in cases of sepsis, septic shock and in severe systemic inflammatory reactions. The early pathological features of acute respiratory distress syndrome (ARDS) are generally described as diffuse alveolar damage, which can be diagnosed by cytological examination of bronchoalveolar lavage fluid (BAL) [1]. The aim of this study was to evaluate the value of PCT measurement in BAL and serum in the early diagnosis, and to faciliate reliable follow-up of the clinical course of ARDS.…”