TDRD9 and cutaneous melanoma: Analysis of TDRD9 expression in two sets of lung adenocarcinomas [17, 18] and skin melanomas [19, 20] showed that, in the cancer samples, values did not follow a normal (Gaussian) distribution (Shapiro-Wilk test P < 0.00001) (Figure 1A), suggesting that the positive outlier values did not result from random variance.