Photograph of immunocytochemical staining for CD34 antigen together with LFB counterstaining on BALf cytospin (× 1000). Dark brown staining indicates positive staining for CD34 antigen, and the green cytoplasmic staining illustrates eosinophilic granulation. CD34⁺ terminally differentiated eosinophilic cells are marked i, and the CD34^– terminally differentiated eosinophil is marked ii.