Chen J L, Weisbrod G L, Herman S J
Department of Radiological Sciences, Toronto General Hospital, Ontario, Canada.
J Thorac Imaging. 1988 Jan;3(1):61-5. doi: 10.1097/00005382-198801000-00010.
Computed tomographic and pathologic correlations of the thymus gland were assessed in 69 patients. The sensitivity of computed tomography (CT) for undifferentiated thymic pathology is 87.1%; the specificity is 85.7%. The sensitivity of CT for neoplasm or mass is 97.1%, the specificity is 97.1%. The sensitivity of CT for lymphoid follicular hyperplasia (LFH) is 71.4%, the specificity is 97.6%. Therefore, a normal-sized thymus gland on CT does not exclude LFH. Completely preserved fat planes between thymic mass and adjacent structures on CT usually indicate a benign (noninvasive) neoplasm; completely absent fat planes usually indicate a malignant (invasive) neoplasm; partially preserved fat planes are indeterminate in assessing invasiveness. CT is also useful in showing recurrence or remnants of thymic tissue in patients who have had a previous thymectomy.
对69例患者的胸腺进行了计算机断层扫描与病理相关性评估。计算机断层扫描（CT）对未分化胸腺病变的敏感性为87.1%；特异性为85.7%。CT对肿瘤或肿块的敏感性为97.1%，特异性为97.1%。CT对淋巴滤泡增生（LFH）的敏感性为71.4%，特异性为97.6%。因此，CT上胸腺大小正常并不能排除LFH。CT上胸腺肿块与相邻结构之间脂肪平面完全保留通常提示良性（非侵袭性）肿瘤；脂肪平面完全消失通常提示恶性（侵袭性）肿瘤；脂肪平面部分保留在评估侵袭性方面不确定。CT对于显示既往接受胸腺切除术后患者胸腺组织的复发或残留也很有用。
