Abstract
Objectives
Pituitary adenomas can exhibit aggressive behavior, characterized by rapid growth, resistance to conventional treatment, and early recurrence. This study aims to evaluate the clinical value of shape-related features combined with textural features based on conventional MRI in evaluating the aggressiveness of pituitary adenomas and develop the best diagnostic model.
Methods
Two hundred forty-six pituitary adenoma patients (84 aggressive, 162 non-aggressive) who underwent preoperative MRI were retrospectively reviewed. The patients were divided into training (n = 193) and testing (n = 53) sets. Clinical information, shape-related, and textural features extracted from the tumor volume on contrast-enhanced T1-weighted images (CE-T1WI), were compared between aggressive and non-aggressive groups. Variables with significant differences were enrolled into Pearson’s correlation analysis to weaken multicollinearity. Logistic regression models based on the selected features were constructed to predict tumor aggressiveness under fivefold cross-validation.
Results
Sixty-five imaging features, including five shape-related and sixty textural features, were extracted from volumetric CE-T1WI. Forty-seven features were significantly different between aggressive and non-aggressive groups (all p values < 0.05). After feature selection, four features (SHAPE_Sphericity, SHAPE_Compacity, DISCRETIZED_Q3, and DISCRETIZED_Kurtosis) were put into logistic regression analysis. Based on the combination of these features and Knosp grade, the model yielded an area under the curve value of 0.935, with a sensitivity of 94.4% and a specificity of 82.9%, to discriminate between aggressive and non-aggressive pituitary adenomas in the testing set.
Conclusion
The radiomic model based on tumor shape and textural features study from CE-T1WI might potentially assist in the preoperative aggressiveness diagnosis of pituitary adenomas.
Key Points
• Pituitary adenomas with aggressive behavior exhibit rapid growth, resistance to conventional treatment, and early recurrence despite gross resection and may require multiline treatments.
• Shape-related features and texture features based on CE-T1WI were significantly correlated with the Ki-67 labeling index, mitotic count, and p53 expression, and the proposed model achieved a favorable prediction of the aggressiveness of PAs with an AUC value of 0.935.
• The prediction model might provide valuable guidance for individualized treatment in patients with PAs.
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Abbreviations
- AUC:
-
Area under the curve
- CE-T1WI:
-
Contrast-enhanced T1-weighted image
- ESE:
-
European Society of Endocrinology
- PAs:
-
Pituitary adenomas
- ROC:
-
Receiver operating characteristic
- WHO:
-
World Health Organization
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Funding
This study has received funding by the National Natural Science Foundation of China (grant no.82171885), Shanghai Science and Technology Committee Project (Natural Science Funding; grant no.20ZR1433200), and Shanghai Science and Technology Committee Project (the Explorer Project Funding; grant no. 21TS1400700).
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The scientific guarantor of this publication is Yan Zhou.
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The authors (Yongming Dai and Hai Lin) of this manuscript declare relationships with the following companies: United Imaging Healthcare. The remaining authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
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Wang, X., Dai, Y., Lin, H. et al. Shape and texture analyses based on conventional MRI for the preoperative prediction of the aggressiveness of pituitary adenomas. Eur Radiol 33, 3312–3321 (2023). https://doi.org/10.1007/s00330-023-09412-7
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DOI: https://doi.org/10.1007/s00330-023-09412-7