Figure 2:

Heatmap including histomorphological features of papillary renal cell carcinomas and pathologic staging variables. For binary variables, red indicates the feature was present, and blue indicates the feature was absent. For percentage variables, red indicates 100%, blue indicates 0%, and varying shades of blue, red, and purple indicate percentage per the color key. For ordinal variables, red indicates the highest category, and blue indicates the lowest category, with varying color shades indicating higher category per the color key. For numeric variables, red indicates the highest value, blue indicates the lowest value, and varying shades indicate higher values per the color key. For gender, red indicates female and blue male. White indicates data for the variable was not available.