Figure 1. The pedigree diagram of this Chinese Han family with hereditary hemorrhagic telangiectasia Type 2 (HHT2). The arrowhead indicates the proband of this family, indicates HHT2 patients, and indicates the normal family numbers. There are eight patients, including the proband, and 46 normal individuals in this family. It is an autosomal-dominant hereditary disease, according to genetic analysis.