%0 Case Reports %T Case Report: Detection of a Novel Germline PALB2 Deletion in a Young Woman With Hereditary Breast Cancer: When the Patient's Phenotype History Doesn't Lie. %A De Angelis C %A Nardelli C %A Concolino P %A Pagliuca M %A Setaro M %A De Paolis E %A De Placido P %A Forestieri V %A Scaglione GL %A Ranieri A %A Lombardo B %A Pastore L %A De Placido S %A Capoluongo E %J Front Oncol %V 11 %N 0 %D 2021 %M 33718150 %F 5.738 %R 10.3389/fonc.2021.602523 %X The partner and localizer of BRCA2 (PALB2) is a major BRCA2 binding partner that participates in homologous recombination repair in response to DNA double-strand breaks. Germline alterations of the PALB2 gene have recently been associated with a high risk of developing breast cancer. We investigated a 37-year-old Caucasian woman with breast cancer and family history of breast cancer using targeted next generation sequencing. A novel heterozygous deletion involving exons 5 and 6 was found in the PALB2 gene, and resulted in the production of a truncated PALB2 protein. These findings expand the mutational spectra of PALB2-associated breast cancer, and may improve the mutation-based screening and genetic diagnosis of breast cancer.