Epithelioid histiocytoma pathology

Figure 2

Histology of epithelioid histiocytoma

In epithelioid histiocytoma, sections show a centrally located, circumscribed tumour underlying an epidermal collarette (figure 1). The tumour is composed of epithelioid cells arranged in sheets and sometimes a storiform pattern. Individual cells show abundant eosinophilic cytoplasm with round vesicular nuclei and prominent nucleoli (figures 2-4). The cells may be markedly enlarged and display some nuclear atypia (figure 4).

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