This visualization compares the age distribution of skin cancer patients by sex using side-by-side box plots. The chart displays quartiles, medians, whiskers, and outliers for each group, with age on the y-axis and sex on the x-axis. Built with D3 v4, it loads CSV data from a GitHub gist and uses d3.nest() and d3.quantile() to compute summary statistics, then renders the boxes, median lines, and axes as SVG elements.