Computed tomography of the pelvis: Utilizing the oil-filled method in evaluation of bladder neoplasm.

Five patients with oil-filled bladders were studied by computed tomography, which dramatically demonstrated the intravesical tumor component. Negative contrast bladder opacification technique is found to be accurate, reproducible and simple. Negative contrast avoids false evaluation near the bladder well from partial volume effect as occurs with positive contrast material. Thus, CT staging of bladder neoplasm may be considered a highly accurate procedure.