Those bits of wood that come with a canvas are called canvas keys, and are for ensuring the canvas remains tight. Photo Â© Marion Boddy-Evans.Licensed to About.com, Inc.f youâve bought an unprimed ready-made canvas, or are stretching your own, donât use keys until after youâve primed the canvas, as priming makes the it more rigid. Some canvases are made with rigid corners, without the option of hammering in a wedge or key.
meâ¢tasâ¢taâ¢sis. a. the spread of disease-producing organisms or of malignant or cancerous cells to other parts of the body by way of the blood or lymphatic vessels or membranous surfaces. b. the condition produced by this. metastasis metÃ¡stasis a. Changing see -, meta ]. stasis
Learn more about the symptoms of spinal metastatic disease. Metastases occurs when cancer spreads from one area of the body to another. For example, cancer may spread from the lung to the stomach. Spinal metastatic disease occurs when cancer spreads from the primary cancer site to the spine. The spine is the third most common location for metastases to occur in, often as the result of an original diagnosis of lung or breast cancer that has metastasized.