case_images: PMC535548_01
case_images: Pleural fluid at 630x demonstrating small round cells with salt and pepper chromatin. Note multiple mitotic figures
case_images: 1742-6413-1-5-1.jpg
case_images: PMC535548_01_1742-6413-1-5-1.jpg
case_images: F1
case_images: The fluid was grossly bloody and cytology revealed abundant, round, basophilic single cells, many in mitosis, with characteristic granular, "salt and pepper" nuclear chromatin (Figure 1).
case_images: Cell block stained with CK20 demonstrating sharp perinuclear dot like pattern.
case_images: 1742-6413-1-5-2.jpg
case_images: PMC535548_01_1742-6413-1-5-2.jpg
case_images: F2
case_images: A cellblock was made and immunohistochemical staining with CK20 revealed characteristic positivity in a dot like rim pattern (Figures 2).