Gastrointestinal: Adjective referring collectively to the stomach and small and large intestines. The commonly used abbreviation for gastrointestinal is GI. (Outside of medicine, GI can also stand for galvanized iron, general issue or government issue-as in GI Joe).
Before the extracellular matrix is calcified, the tissue is called osteoid (bone-like) tissue. When the concentrations of calcium and phosphate ions rise high enough, they are deposited into the extracellular matrix, and the bone calcifies.
Treatment. 1  Today, most osteoid osteomas are amenable to CT guided percutaneous radiofrequency ablation (RF Ablation). 2  Some patients may require open surgical excision or Burr Down Resection of the osteoid osteoma.reatment. 1  Today, most osteoid osteomas are amenable to CT guided percutaneous radiofrequency ablation (RF Ablation). 2  Some patients may require open surgical excision or Burr Down Resection of the osteoid osteoma.