الفهرس 
Introduction & aim of the workOnly 14 pages are availabe for public view
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Abstract
In this study, the study group consisted of 81 patients, there age ranged between 8-80 years with mean 44 years. Fifty-one patients were male and 30 were female. Not all patients were biopsies as 11 patients had pathognomic features of benign lesions and just follow up was recommended for them. Biopsies were performed for only 70 patients.
We can conclude from this study that CT-guided biopsy is a simple and inexpensive investigation that has a high diagnostic yield in patients with bone tumors, histopathological diagnosis & ability to differentiate benign from malignant tumors. It has a lower rate of complication. Additional potential advantages of percutaneous needle biopsy of various tumor quadrants, a preoperative planning, ability to more rapidly benign neoadjuvant chemotherapy and a more limited biopsy tract to be removed to obtain the diagnosis before administration of neoadjuvant chemotherapy. With a definitive diagnosis, neoadjuvant chemotherapy or radiation therapy can be started the day after core needle biopsy.
Factors associated with higher yields include metastatic disease, infections, peripheral location and soft tissue biopsy. The diagnostic yields are low in systic & mixed density lesions.
In our experience, performing more than two biopsies did not provide additional diagnosis.
In most of cases, we used local anesthesia for preceding the techniques and general anesthesia is restricted for children.
Results of this study and of others showed that in carefully controlled situations in which the radiologist works in a team approach with the orthopedics, oncologist & pathologist, the results of CT guided biopsy can be extremely effective and account.