Analysis of radiological features relative to pathology in pelvic chondrosarcoma / 中华放射学杂志

ABSTRACT

Objective To Explore the imaging features relative to pathology of pelvic chondrosarcoma and to evaluate the clinical value.Methods All 12 cases patients with primary pelvic chondrosarcoma confirmed by pathological examination underwent radiography,spiral CT plain scanning,MR SE-T1WI,FSE-T2WI and SE-Tl WI enhancement scanning before operation.The imaging data was reviewed and analyzed retrospectively to compare with surgical and pathological results.Results Eleven conventional chondrosarcoma and one dedifierentiated chondrosarcoma were located in different parts of pelvis.The diameters of the tumors ranged from 4.7 to 17.0 cm with one case less than 5.0 cm,6 cases being 5.O-10.0 am and 5 cases more than 10.0 Cln.The CT valHe of 5 cases was identical or inferior to muscle with mild to moderate"ring-and-arc"mineralization and soft mass.MR imaging depict the high water content of these lesions as very high signal intensity was detected on T2 WI.Six cases showed typical"ring-and-arc"fibrous tissue which enhanced persistently.Aggressive features of deep endosteal scalloping and soft-tissue extension was also found in these cases.Conclusions Radiographic findings Can suggest the diagnosis of pelvic chondrosarcoma when there is typical"ring-and.arc"fibrous tissue,mineralization,aggressive features of deep endosteal scalloping and large soft-tissue extension.MR imaging reflect directly this pathologic structure,superior to that of CT and radiography.CT is optimal to detect the matrix mineralization,particularly when it is subtle or when the lesion is located in anatomically complex pelvic areas.