title: Electron microscopy of three cases of choroid malignant melanomas.
abstract: Ultrastructural study, by Scanning and Transmission Electron Microscopy, of three choroidal melanomas allows us to depict main features and cellular types of melanomas and to discuss our results with precedent studies. One case of balloon-cell tumor shows an unusual (from unknown genesis) substance, intra- or extracellularly located, but always near pigment cells expansions.
mesh_terms: D000368:Aged; D002830:Choroid Neoplasms / Q000098:blood supply / Q000378:metabolism / Q000473:pathology / Q000648:ultrastructure*; D005260:Female; D006801:Humans; D007365:Intercellular Junctions / Q000648:ultrastructure; D008297:Male; D008545:Melanoma / Q000098:blood supply / Q000378:metabolism / Q000473:pathology / Q000648:ultrastructure*; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D008875:Middle Aged; D010860:Pigments, Biological / Q000378:metabolism
chemical_list: D010860:Pigments, Biological