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Clinical Article
Differential diagnosis of pituitary macroadenomas and sellar meningiomas by MRI basic signs combined with ADC value
HAN Tao  ZHANG Jing  WANG Dan  ZHANG Bin  DENG Liangna  LIN Xiaoqiang  JING Mengyuan  ZHOU Junlin 

Cite this article as: Han T, Zhang J, Wang D, et al. Differential diagnosis of pituitary macroadenomas and sellar meningiomas by MRI basic signs combined with ADC value[J]. Chin J Magn Reson Imaging, 2021, 12(5): 6-11. DOI:10.12015/issn.1674-8034.2021.05.002.


[Abstract] Objective To explore the value of MRI signs combined with ADC value in the differential diagnosis of pituitary macroadenomas and sellar meningiomas. Materials andMethods Forty-two cases of pituitary macroadenomas and 40 cases of sellar meningiomas confirmed by pathology, were analyzed retrospectively. All cases were examined by traditional magnetic resonance imaging (MRI) and diffusion-weighted imaging (DWI) before operation.The apparent diffusion coefficient (ADC) value was measured in the solid part of the tumor and compared with the results of pathological diagnosis. t-test, Chi-square test were used in statistical methods, and the diagnostic efficacy of each parameter in differentiating the two groups of tumors was evaluated by the receiver working characteristic (ROC) curve.Results Between pituitary macroadenomas and sellar meningiomas, significant enhancement (33%/95%, χ2=33.581), waist sign (93%/7.5%, χ2=50.831), wrapped around internal carotid artery (95%/57.5%, χ2=16.390), enlarged sella turcica (93%/52.5%, χ2=16.998), pituitary unrecognizable (95%/47.5%, χ2=23.135) and pituitary stalk invisible (90%/62.5%, χ2=7.761) were statistically significant (P<0.05). The ADCmax (ADCmean and ADCmin) of pituitary macroadenoma and sellar meningioma was (1.126±0.266)×10-3 mm2/s and (0.855±0.176)×10-3 mm2/s [(1.052±0.271)×10-3 mm2/s and (0.817±0.177)×10-3 mm2/s, (0.971±0.288)×10-3 mm2/s and (0.777±0.182)×10-3 mm2/s, P<0.001]. Among ADC values, ADCmax demonstrated good performance with an AUC of 0.877 (95% CI, 0.791—0.962) and when the cut-off of ADCmax is 0.970×10-3 mm2/s, the sensitivity and specificity of distinguishing them are 81% and 92.5%.Conclusions The basic signs of MRI combined with ADC value have high clinical value in the diagnosis of pituitary macroadenomas and sellar meningiomas, Which can improve the accuracy of preoperative diagnosis.
[Keywords] pituitary macroadenomas;sellar meningiomas;magnetic resonance imaging;diffusion-weighted imaging;apparent diffusion coefficient

HAN Tao1, 2, 3   ZHANG Jing1, 2, 3   WANG Dan1, 3   ZHANG Bin1, 2, 3   DENG Liangna1, 2, 3   LIN Xiaoqiang1, 2, 3   JING Mengyuan1, 2, 3   ZHOU Junlin1, 3*  

1 Department of Radiology, Lanzhou University Second Hospital, Lanzhou 730030, China

2 Second Clinical School, Lanzhou University, Lanzhou 730030, China

3 Key Laboratory of Medical Imaging of Gansu Province, Lanzhou University, Lanzhou 730030, China

Zhou JL, E-mail: lzuzjl601@163.com

Conflicts of interest   None.

ACKNOWLEDGMENTS This work was part of National Natural Science Foundation of China (No. 81772006). Lanzhou University Second Hospital "Cuiying Technology Innovation Plan" Applied Basic Research Project (No. CY2017-MS03).
Received  2020-11-13
Accepted  2021-01-21
DOI: 10.12015/issn.1674-8034.2021.05.002
Cite this article as: Han T, Zhang J, Wang D, et al. Differential diagnosis of pituitary macroadenomas and sellar meningiomas by MRI basic signs combined with ADC value[J]. Chin J Magn Reson Imaging, 2021, 12(5): 6-11. DOI:10.12015/issn.1674-8034.2021.05.002.

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