A study has found that the incidence rates of soft tissue sarcoma types in cancer patients who are 15 to 29 years old vary among racial/ethnic groups

According to the study, the incidence of all soft tissue sarcomas combined was 34% higher in males than females, 60% higher among African-Americans than Caucasians, and slightly higher among Hispanics than Caucasians. The researchers found that African-American and Hispanic males had a higher incidence of Kaposi sarcoma than Caucasians. For non-Kaposi sarcoma, African-Americans had a significantly higher incidence of fibromatous tumors and rhabdomyosarcoma than Caucasians, Hispanics had a significantly higher incidence of liposarcoma, and Caucasians were more likely to be diagnosed with synovial sarcoma than African-Americans. The National Cancer Institute defines soft tissue sarcoma as a cancer that begins in the muscle, fat, fibrous tissue, blood vessels, or other supporting tissue of the body. There are a number of different types. They include Kaposi sarcoma, a malignancy that occurs in blood vessel walls that often affects people with immune deficiencies, such as HIV/AIDS; fibrosarcoma - tumors in fibrous tissue in the arms, legs, or trunk; liposarcoma - tumors in fatty tissue, often in the legs and trunk; rhabdomyosarcoma - cancer that occurs in skeletal muscle; and synovial sarcoma - cancer in the tissue around the joints and ankles.