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Figure 1: Clustered atypical epithelioid cells from case #1. Most of the cells seen in the cell block were dyscohesive, a few clusters with smooth community borders were seen, such as those pictured here, raising suspicion of a carcinoma. Note the mild atypia with occasional nuclear border irregularities and architectural disorganization with nuclear overlap. However, close inspection reveals no clear differences in cytological features between the clustered cells and the background population of individual cells. Acute inflammation is also present. (H and E, 600 x magnification).

Figure 1: Clustered atypical epithelioid cells from case #1. Most of the cells seen in the cell block were dyscohesive, a few clusters with smooth community borders were seen, such as those pictured here, raising suspicion of a carcinoma. Note the mild atypia with occasional nuclear border irregularities and architectural disorganization with nuclear overlap. However, close inspection reveals no clear differences in cytological features between the clustered cells and the background population of individual cells. Acute inflammation is also present. (H and E, 600 x magnification).