title: C3 deficiency presenting as Raynaud's phenomenon in a 6-year-old girl with a persistent erythematous rash.
mesh_terms: D003176:Complement C3 / Q000172:deficiency*; D005260:Female; D006801:Humans; D007223:Infant; D011928:Raynaud Disease / Q000276:immunology*; D012871:Skin Diseases / Q000276:immunology*
chemical_list: D003176:Complement C3