Desmoplastic Small Round Cell Tumor, a “Floating Island” Pattern in Pleural Fluid Cytology: A Case Report and Review of the Literature

<div>A cohesive group of metastatic DSRCT cells in pleural fluid with central epithelioid forms and a few flattened/elongated cell forms at the periphery of the island, marked with small arrows. The lesional central epithelioid cells are diffusely immunoreactive with cytokeratin AE1/AE3, and the peripheral spindled forms show the same pattern of reactivity with strong cytoplasmic staining (cell block, AE1/AE3 immunohistochemistry, 400x).</div>

Case Reports in Pathology

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Figure 7

Figure 7: Desmoplastic Small Round Cell Tumor, a “Floating Island” Pattern in Pleural Fluid Cytology: A Case Report and Review of the Literature 