Histopathological characteristics of pulmonary malignant melanoma: The tumor cells located under bronchial mucosa, and was composed of malignant epithelioid tumor cells with large amounts of acidophilic cytoplasm and prominent nuclei. Mitotic figures were easily found. Dark brown pigment were observed in some tumor cells (A, ×200; B,C, and D, ×400).
Gong et al. Diagnostic Pathology 2012 7:123 doi:10.1186/1746-1596-7-123