|Osteosarcoma, the second most common primary malignant bone tumor, is usually found in long bones 42percent occupying the femur, 19 percent in tibia, and 10 percent in the humerus. About 8percent of all cases occur in the skull and jaw and other 8% in the pelvis . Osteosarcoma of jaw is rare, aggressive malignant tumor which is characterized by formation of osteoid tissue. Jaw osteosarcomas usually presents in 3rd and 4th decade of life.
Scientific journal is a periodical publication intended to further progress of science, usually by reporting novel research. There are thousands of scientific journals in publication, and many more have been published at various points in the past. Most journals are highly specialized, although some of the oldest journals publish articles and scientific papers across a wide range of scientific fields. Scientific journals contain articles that are peer reviewed, to ensure that articles meet the journal's standards of quality, and scientific validity. The publication of the results of research is an essential part of the scientific method. If they are describing experiments or calculations, they must supply enough details that an independent researcher could repeat the experiment or calculation to verify the results. Each such journal article becomes part of the permanent scientific record.