Laboratory investigations demonstrated anaemia (Hb: 7.9 g/dL), raised CRP at 133 mg/l and leucocytosis (WCC 14.3 × 103/μl).Gastro-duodenoscopy revealed mild chronic gastritis and reactive gastropathy whilst colonoscopy ruled out the possibility of inflammatory bowel disease. This evidence concerns the gene GSTM1 and anemia (phenotype).