鼻窦放射密度影的意义：骨化、钙化还是残留骨？
The significance of sinonasal radiodensities: ossification, calcification, or residual bone?
作者信息
Som P M, Lidov M
机构信息
Department of Radiology, Mount Sinai School of Medicine, City University of New York, NY 10029.
出版信息
AJNR Am J Neuroradiol. 1994 May;15(5):917-22.
PURPOSE
To determine whether very radiodense material within a sinonasal soft-tissue mass on CT can be differentiated as calcification, ossification, or residual bone.
METHODS
We retrospectively described the radiodensities within 235 sinonasal soft-tissue masses as discrete, solitary or multiple, or as a diffuse process with either a well-defined or poorly defined margin. They were also classified as calcification, ossification, or residual bone. Findings were correlated with pathologic specimens.
RESULTS
Residual bone was underdiagnosed; calcification was overdiagnosed. A solitary discrete density was most likely to be calcification within an inflammatory mass. However, multiple discrete densities were as likely to be in a tumor as in an inflammatory lesion. If the process was diffuse with a well-defined margin, it was most likely to be a benign fibroosseous lesion. If the process was diffuse with a poorly defined margin, it was most likely to be a high-grade sarcoma. Densities within inverted papillomas were shown to be residual bone, not calcifications; densities within esthesioneuroblastomas were calcifications.
CONCLUSION
Radiodensities may help in refining a CT diagnosis, but one may not know based on CT whether the density is a calcification, ossification, or residual bone.
目的
确定鼻窦软组织肿块在CT上的极高密度物质能否区分为钙化、骨化或残留骨。
方法
我们回顾性描述了235个鼻窦软组织肿块内的放射密度，将其分为离散型、孤立或多发型，或为边界清晰或不清晰的弥漫性病变。它们还被分类为钙化、骨化或残留骨。研究结果与病理标本进行了对比。
结果
残留骨被漏诊；钙化被过度诊断。孤立的离散密度最可能是炎性肿块内的钙化。然而，多个离散密度在肿瘤和炎性病变中出现的可能性相同。如果病变是边界清晰的弥漫性病变，则最可能是良性纤维骨病变。如果病变是边界不清晰的弥漫性病变，则最可能是高级别肉瘤。内翻性乳头状瘤内的密度显示为残留骨，而非钙化；嗅神经母细胞瘤内的密度为钙化。
结论
放射密度可能有助于完善CT诊断，但仅根据CT无法确定密度是钙化、骨化还是残留骨。
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