Malignant melanoma dermoscopy involves the examination of skin lesions using a dermatoscope, a magnifying device with polarized light and cross-sectional illumination. This technique enhances the visualization of architectural and color patterns in the lesion, allowing for better differentiation between benign and malignant melanomas. Dermoscopy aids in early detection, accurate diagnosis, and targeted biopsies, improving the overall management and outcomes for melanoma patients.