A genetic test led to the identification of the HLA-DRB1*0301 and HLA-DRB1*150 genes associated with both sarcoidosis and MN, which provides a new possible explanation of the co-occurrence of these two diseases.<h4>Conclusion</h4>This case suggested for the first time a potential genetic connection between idiopathic MN and sarcoidosis which needs further studies in the future. Here, HLA-DRB1 is linked to sarcoidosis.