Type of Preparation: SurePath/ LBP Magnification: High Interpretation: Other Malignant Neoplasms: Metastatic small cell undifferentiated carcinoma Cytomorphologic Criteria: This tight cluster is composed of small epithelial cells with stippled chromatin, inconspicuous nucleoli and nuclear molding. An adjacent single malignant cells resembles an atypical lymphocyte. Explanatory Notes: Note the three-dimensional appearance of the cluster in a liquid preparation compared to conventional smear. The presence of clusters will help in the differential diagnosis with malignant lymphoma.