It tends to metastasize, or spread, quickly.
The retinal tumor which characterizes retinoblastoma is malignant, meaning that it can metastasize (spread) to other parts of the eye and eventually other parts of the body.
Because more than four of every five malignant bone tumors metastasize to the lungs, a CAT scan of the chest is performed to see if these organs have been affected.
Most primary bone tumors are benign, and the cells that compose them do not spread (metastasize) to nearby tissue or to other parts of the body.
They can infiltrate nearby tissues, enter the bloodstream, and metastasize to bones, tissues, and organs far from the original malignancy.
It takes years for a chondrosarcoma to metastasize to other parts of the body, and some of these tumors never spread.
It's not likely to metastasize but can spread and grow, causing serious tissue damage and scarring.
It rapidly infiltrates the lungs and may metastasize to bones in other parts of the body.
With cancers that metastasize, what you see on your skin may be the tip of the iceberg.