Seborrheic keratosis are non-cancerous growths. They are often brown but can vary from mild brown to black. They range in dimension from a number of millimeters to much larger than ten millimeters in diameter. Their most important feature will be the waxy, “pasted-on” or “stuck-on” visual appeal. The data on https://www.sgvascularctr.com/understanding-benign-tumor-treatment-options/