[Marfan's syndrome].

A family with Marfan's syndrome is reported showing as outstanding features, demonstration of the hereditary character of the entity through the genealogical tree. The classical clinical characteristics of the disease are: long face, arachnodactyly, decreased subcutaneous tissue, muscular hypoplasia, somatometric values above normal percentiles for Mexicans, weight and perimeters of arm and leg showing low mass and height, upper and lower segments above percentil 50 and ocular disorders like bilateral ectopia lentis, spherical and small lens, iridodonesis and myopia.