Primary Pulmonary Anaplastic Large Cell Lymphoma: A Rare Malignancy and Rare Cause of the Luftsichel Sign

Figure 4

(a) Endobronchial polypoid mass

(b) Large cells with pleomorphic nuclei, some with folded nuclear contours. Arrows depict so-called “clue cells”

(c) Neoplastic cells show strong, diffuse reactivity to CD30

(d) Neoplastic cells showing strong reactivity to ALK-1