title: Selective C1q deficiency in a patient with systemic lupus erythematosus.
abstract: We report a case of systemic lupus erythematosus with selective C1q deficiency. C1q deficiency had been presumed to be a non-hereditary disorder; however, the 10 reported cases in the world literature, and our case, suggest that C1q deficiency could also be an inherited disease.
mesh_terms: D000328:Adult; D003166:Complement Activating Enzymes / Q000172:deficiency*; D003172:Complement C1 / Q000172:deficiency*; D015922:Complement C1q; D005260:Female; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000235:genetics / Q000276:immunology* / Q000473:pathology; D010375:Pedigree
chemical_list: D003172:Complement C1; D015922:Complement C1q; D003166:Complement Activating Enzymes