Only very few IL-17+ lymphocytes were detected in either cancer subtype (ductal: 1.4 ± 3.0; lobular: 2.4 ± 5.4, p = 0.046), with a slight trend towards relatively higher counts in the stromal compartment of lobular as compared to ductal carcinomas (1.1 ± 2.3 vs. 1.8 ± 3.4; p = 0.048). Here, IL17A is linked to cancer.