The first symptom of bone cancer is usually pain or tenderness near the cancer. Bone pain is caused by stretching of the periosteum (thick membrane that covers bone) by the cancer, or by stimulation of nerves within the bone. Bone pain may be hard to differentiate from ordinary low back pain or arthritis.
Geometric art is a phase of Greek art, characterized largely by geometric motifs in vase painting, that flourished towards the end of the Greek Dark Ages, circa 900 BC to 700 BC. Its centre was in Athens, and it was diffused amongst the trading cities of the Aegean.
Art Nouveau. Decorative style of the late 19th and early 20th centuries that flourished principally in Europe and the U.S. Although it influenced painting and sculpture, its chief manifestations were in architecture and the decorative and graphic arts. It is characterized by sinuous, asymmetrical lines based on organic forms.