Objective

The study aimed to present the accuracy of radiological diagnostics in pediatric patients with nasal dermoids and to discuss the potential factors influencing the radiological pitfalls on imaging in these cases.

Material and methods

The patient's cohort included 25 surgically treated pediatric cases with nasal dermoid. The results of preoperative imaging studies were analyzed regarding intraoperative findings. A review of the literature concerning a series of cases with nasal dermoid was performed in order to evaluate the possible radiological pitfalls and the accuracy of radiological imaging. The following statistical parameters for the particular radiological tools was determined: sensitivity, specificity, predictive positive values and predictive negative values.

Results

Total number of 18 CT and 14 MRI were performed. 6 out of 32 radiological examinations occurred to be inconsistent with operative findings. Potential pitfalls were identified and discussed. All the patients with false radiological results were below the age of 5 and 83% were below the age of 3 y.o. The overall sensitivity (S), specificity (SP), predictive positive value (PPV) and predictive negative value (PNV) for CT vs. MRI were 68% vs. 79%, 90% vs. 95%, 65% vs. 86% and 90% vs. 92%, respectively.

Conclusions

MRI technique characterizes with higher predictive values in terms of identifying intracranial extension of nasal dermoid on imaging. Further analysis of radiological methods' accuracy should be conducted based on the detailed data concerning age distribution. The combination of CT and MRI should become a gold standard in diagnostics of nasal dermoids in children under the age of 5.

中文翻译：

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鼻皮样瘤的放射诊断：陷阱、预测值和文献分析

客观的

该研究旨在展示儿童鼻皮样瘤患者放射学诊断的准确性，并讨论影响这些病例中影像学影像学缺陷的潜在因素。

材料与方法

该患者的队列包括 25 例经手术治疗的鼻部皮样儿童病例。对术前影像学检查的结果进行术中发现的分析。为了评估可能的放射学缺陷和放射学成像的准确性，进行了一系列关于鼻皮样瘤病例的文献回顾。确定特定放射学工具的以下统计参数：灵敏度、特异性、预测阳性值和预测阴性值。

结果

共进行了 18 次 CT 和 14 次 MRI。32 次放射学检查中有 6 次与手术结果不一致。确定并讨论了潜在的缺陷。所有影像学检查结果为假的患者均在 5 岁以下，83% 的患者在 3 岁以下 CT 的总体敏感性（S）、特异性（SP）、预测阳性值（PPV）和预测阴性值（PNV）与 MRI 相比，分别为 68% 与 79%、90% 与 95%、65% 与 86% 和 90% 与 92%。

结论

MRI 技术的特点是在影像学上识别鼻皮样颅内扩展方面具有较高的预测价值。放射学方法准确性的进一步分析应根据有关年龄分布的详细数据进行。CT和MRI的结合应该成为5岁以下儿童鼻皮样病变诊断的金标准。