Familial Chilblain Lupus is related to lupus erythematosus and chilblain lupus 1. An important gene associated with Familial Chilblain Lupus is SAMHD1 (SAM And HD Domain Containing Deoxynucleoside Triphosphate Triphosphohydrolase 1), and among its related pathways/superpathways are Cytosolic sensors of pathogen-associated DNA and Pathways of nucleic acid metabolism and innate immune sensing. Affiliated tissues include skin and bone.