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 by small arrows. The lesional epithelioid cells are nonreactive with smooth muscle actin (SMA), and the peripheral spindled forms show the same pattern of reactivity with no cytoplasmic staining (cell block, SMA immunohistochemistry, 400x).</div>

Case Reports in Pathology

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Figure 8

Figure 8: Desmoplastic Small Round Cell Tumor, a “Floating Island” Pattern in Pleural Fluid Cytology: A Case Report and Review of the Literature 