Interestingly, none of the BC patients in Barbados tested positive for BRCA1. Although the ratio of BRCA1/2 was similar between Jamaica (1.7) and Trinidad and Tobago (1.5), the presence of PALB2 was much higher in the Jamaican sample (2.8%) compared to the Trinbagonian sample (0.75%). Here, PALB2 is linked to breast cancer.