Elastic staining of paraffin-embedded lung tissue. Elastic staining of paraffin-embedded lung tissue. A pulmonary arterial lesion from a patient with idiopathic pulmonary arterial hypertension, illustrating the perivascular lymphocytic infiltrate (centre), a small pulmonary artery (left) and a bronchiole (right). Haematoxylin and eosin elastic stain. Scale bar=100 μm. Reproduced and modified from [13] with permission from the publisher. Andrew Peacock Eur Respir Rev 2013;22:20-25 ©2013 by European Respiratory Society