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

Table 1

Results of immunohistochemistry.

Antibody	Results
Pan cytokeratin	Negative in neoplastic cells
CAM 5.2	Negative in neoplastic cells
S-100	Negative in neoplastic cells
Vimentin	Positive, strong diffuse cytoplasmic staining
CD45	Negative to weakly positive in scattered neoplastic cells
CD20	Negative in neoplastic cells
PAX5	Negative in neoplastic cells
CD3	Negative in neoplastic cells
CD30	Positive, strong membrane and heterogeneous cytoplasmic staining
Alk-1	Positive, strong membrane and cytoplasmic staining
CD7	Negative in neoplastic cells
CD4	Negative for neoplastic cells
CD8	Weakly positive in neoplastic cells
CD10	Negative in neoplastic cells
CD15	Negative in neoplastic cells
CD56	Negative in neoplastic cells
CD68	Negative in neoplastic cells
MUM-1	Negative in neoplastic cells
Ki-67	Positive in greater than 90% of neoplastic cells