It is when cancer cells break away from a tumour and enter the bloodstream and settle elsewhere in the body. Its not good at all. It is vital that malignant tumours are discovered quickly befor metastasis can occur.
Peter Thomas has written: 'Metastatic potential of human colorectal cancer cell lines' -- subject(s): Cancer, Cell Line, Colon (Anatomy), Colorectal Neoplasms, Immunology, Metastasis, Neoplasm Metatasis, Pathophysiology, Physiopathology, Rectum 'Companion guide to Far from the madding crowd for 'O' level students'
Sclerotic lesions are areas of increased bone density often seen in medical imaging, indicating abnormal bone growth or remodeling. When associated with metastasis, these lesions typically arise from cancer cells spreading to the spine from other parts of the body, such as the breast, prostate, or lung. Common causes of sclerotic lesions on the spine include primary bone tumors, metastatic cancers, and conditions like osteoblastic lesions, where the bone formation is stimulated in response to tumor activity.