NCCN Cancer Centers

The National Comprehensive Cancer Network (NCCN) is a not-for-profit alliance of 23 of the world’s leading cancer centers. We are dedicated to improving the quality and effectiveness of care provided to people with cancer.

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Term Definition
Leiomyosarcoma

A malignant (cancerous) tumor of smooth muscle cells that can arise almost anywhere in the body, but is most common in the uterus, abdomen, or pelvis.
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