RESUMEN
Two cases of asymptomatic primary biliary cirrhosis (PBC) combining CREST syndrome. We have had encountered two primary biliary cirrhosis (PBC) patients overlapped with CREST syndrome. Case 1 was a 51-year-old female, who was suffering from Raynaud's phenomenon, esophageal dysmotility and sclerodactyly. Case 2 was a 67-year-old female, who was suffering from Raynaud's phenomenon, esophageal dysmotility, sclerodactyly and telangiectasia. They were free from itching and icterus. The histology of their biopsied liver specimen should stage I-II of Scheuer's classification. Their immunological findings showed anti-centromere antibody, (ACA) at a high titer (1 : 1280 dilution) and anti-mitochondrial antibody (AMA) at a low titer (1 : 40 dilution) positive in both. HLA DR types included DR2 and DRW8 in case 1, and did DR1 and DRW6 in case 2. Both patients are having good prognosis.