Background: The aim of this study was to investigate the diagnostic value cryptococcal antigen-lateral flow immunochromatographic assay (CrAg-LFA) in bronchoalveolar lavage fluid (BALF) patients with pulmonary cryptococcosis (PC). Methods: A total 308 were divided into PC group (n = 72) and non-PC 236). clinical data, pathogen detection, radiological imaging, detection antigen blood BALF sample...