Cellular morphology of human malignant melanoma in primary culture
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Early monolayer outgrowths of cells from human cutaneous malignant melanomas mostly derived from metastatic lesions were examined microscopically. Cells resembling the two dendritic types of melanoma previously described in the established lines could readily be recognized. Of 22 specimens, 14 consisted of cells with a triangular dendritic morphology, four had both triangular and elongated dendritic morphology, and one had a cuboidal morphology. The remaining three specimens showed only fibroblastic outgrowths. It is concluded that cells with a triangular dendritic morphology are either the most common type of the secondary cutaneous melanomas, or alternately the most adaptable to the present culture conditions. An association of a more favorable prognosis with the homogeneous triangular dendritic cell type is noted.
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