There are many symptoms of klinefelter syndrome. The symptoms include infertility, gynecomastia, reduced facial and body hair, cryptorchidism, hypospadias, micro penis, abnormal height, small amounts of testosterones, delayed or incomplete puberty, learning disabilities, delayed speech and language development, and increased risk of breast cancer and a chronic inflammatory disease. Occasionally the person diagnosed with klinefelter syndrome have more than one extra X chromosome and these symptoms are increased in severity, these are people with a variant of klinefelter syndrome. Some features of the variant of klinefelter syndrome include skeletal abnormality, intellectual disability, distinctive facial features, poor coordination, and speech problems. Some people diagnosed with klinefelter syndrome have the extra X chromosome in only some of their cells, some cells are XY and some are XXY. People diagnosed with this variant have milder symptoms. The life expectancy for men with klinefelter syndrome is the average life expectancy. There is no known cure for klinefelter syndrome. Treatment for klinefelter can come from testosterone therapy, and a type of doctor called a endocrinologist.