The width and depth of the spread of malignant melanomas as observed by a chemosurgeon.
D004617:Embolism / Q000473:pathology; D006801:Humans; D008207:Lymphatic Metastasis; D008545:Melanoma / Q000473:pathology* / Q000601:surgery; D008722:Methods; D012878:Skin Neoplasms / Q000473:pathology* / Q000601:surgery