Final answer:
The most common type of melanoma is characterized by asymmetric lesions with uneven borders, various colors, and more than 6mm in diameter, often with a raised surface. Key identifiers include the ABCDE mnemonic: Asymmetry, Borders, Color, Diameter, and Evolving. Early detection and treatment are crucial for a better prognosis.
Step-by-step explanation:
The most common type of melanoma is characterized by asymmetric, flat lesions that are larger than 6mm in diameter, vary in color, and often have a lateral, horizontal spread rather than deeper, vertical growth. These melanomas typically present as large brown or black patches with uneven borders and a raised surface. It's essential to recognize the ABCDE mnemonic for melanoma: Asymmetry, irregular Borders, varied Color, large Diameter, and Evolving appearances of moles or skin lesions. In addition to these, nodular melanoma, a more serious form, may demonstrate elevation, firmness, and a growing size. Melanoma stems from uncontrolled growth in melanocytes, the pigment-producing cells in the epidermis, and can be highly lethal due to its metastatic nature if not detected and treated early.