title: A selective and complete absence of C1q in a patient with vasculitis and nephritis.
mesh_terms: D002648:Child; D003166:Complement Activating Enzymes / Q000172:deficiency*; D015922:Complement C1q; D005260:Female; D005455:Fluorescent Antibody Technique; D006461:Hemolysis; D006650:Histocompatibility Testing; D006801:Humans; D007678:Kidney Glomerulus / Q000276:immunology / Q000648:ultrastructure; D009393:Nephritis / Q000150:complications / Q000276:immunology*; D010375:Pedigree; D018366:Vasculitis, Leukocytoclastic, Cutaneous / Q000150:complications / Q000235:genetics / Q000276:immunology*
chemical_list: D015922:Complement C1q; D003166:Complement Activating Enzymes