PR J.L. KEMENY, ISM / SCIENCE PHOTO LIBRARY PR J.L. KEMENY, ISM / SCIENCE PHOTO LIBRARY
Light micrograph of a section through bone showing osteosarcoma cancer. Cancerous cells (dark) have produced many regions of disordered bony filaments (osteoids, pink). This highly malignant cancer, more common in young people, usually starts in a long bone and spreads rapidly.
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