Case Report
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 |
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