PINX1 and medulloblastoma: In addition, Chang et al. [16] analyzed the function of PinX1 in medulloblastoma and found that 11 polymorphisms in its 7 exons and their splicing sites by direct sequencing and that telomerase activity was not inhibited and related to PinX1, indicating PinX1 did not play a key role in the process of medulloblastoma.