Heterologous mixed mesodermal tumors can occur in any age group, including infants, but they most commonly occur in postmenopausal women with a median age of 65. Homologous mixed mesodermal tumors can also occur in all age groups, but the median age is 57 years.
For leiomyosarcomas, the average age at diagnosis is 53.
Low-grade stromal sarcomas occur much more frequently in premenopausal women, with 70 percent occurring in women under 50. High-grade stromal sarcomas most commonly occur in postmenopausal women.
At Significantly Higher Risk
• Previous pelvic radiation.
• Women who are diabetic, hypertensive or obese.
