The stomach is a rounded, hollow organ located just inferior to the diaphragm in the left part of the abdominal cavity. Located between the esophagus and the duodenum, the stomach is a roughly crescent-shaped enlargement of the gastrointestinal tract.
An osteoid osteoma is a benign bone tumor that arises from osteoblasts and was originally thought to be a smaller version of an osteoblastoma. Osteoid osteomas tend to be less than 1.5 cm in size.The tumor can be in any bone in the body but are most common in long bones, such as the femur and tibia.n osteoid osteoma is a benign bone tumor that arises from osteoblasts and was originally thought to be a smaller version of an osteoblastoma. Osteoid osteomas tend to be less than 1.5 cm in size. The tumor can be in any bone in the body but are most common in long bones, such as the femur and tibia.
It is not known what causes osteoid osteoma. Symptoms of osteoid osteoma include: 1  Sharp pain that is worse at night, when your child is at rest, but is commonly relieved with nonsteroidal anti-inflammatory medications.2  Tenderness.n 7-20 percent of cases, osteoid osteoma occurs in the spine. The non-cancerous tumor usually affects patients between the ages of 10 and 30. Boys are twice as likely as girls to develop osteoid osteomas, which can cause extreme pain.