label: Hemosiderin-laden macrophages in bronchoalveolar fluid
label_lc: hemosiderin-laden macrophages in bronchoalveolar fluid
description: "Hemosiderin-laden macrophages (HLM) in bronchoalveolar lavage (BAL) fluid were originally known as adiagnostic biomarker of alveolar hemorrhage, but have also been observed in idiopathic pulmonary fibrosis (IPF) with histopathological pattern of usual interstitial pneumonia (UIP)."