Abstract
Meningeal lymphatic vessels (mLVs) were recently discovered to be involved in the waste drainage process in the brain, which has also been associated with a variety of neurological diseases. This research paper hypothesizes that the drainage function of mLVs may be affected after chronic subdural hematoma (CSDH) and the alterations of mLVs’ drainage may predict CSDH recurrence. In this prospective observational study, unenhanced 3D T2-fluid-attenuated inversion recovery (3D T2-FLAIR) MRI data were collected from CSDH patients and healthy participants for analysis. Patients with CSDH who underwent surgery received MRI scans before and after surgery, whereas healthy controls and patients with CSDH who received pharmaceutical treatment received only one MRI scan at enrollment. The signal unit ratio (SUR) of mLVs were then measured according to the MRI data and calculated to define mLVs’ drainage function. Finally, the relationship between mLVs’ drainage function and CSDH recurrence was analyzed accordingly. Thirty-four participants were enrolled in this study, including 27 CSDH patients and 7 controls. The SUR of mLVs in all CSDH patients changed significantly before and after surgery. Moreover, the drainage function of the mLVs ipsilateral to hematoma (mLVs-IH) in CSDH patients was significantly lower than that in the controls (p < 0.05). Last, a higher improvement rate of the drainage function of the mLVs-IH is correlated to a lower risk of recurrence (p < 0.05). This study revealed the mLVs’ drainage dysfunction after CSDH through non-invasive MRI. Furthermore, the drainage function of mLVs is an independent predictive factor of CSDH recurrence.




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- AUC:
-
Area under the curve
- CFS:
-
Clinical frailty score
- CSDH:
-
Chronic subdural hematoma
- dCLV:
-
Deep cervical lymph vessel
- GCS:
-
Glasgow Coma Scale
- ICC:
-
Interclass correlation coefficient
- Lo-mLVs:
-
Lower mLVs
- mLVs:
-
Meningeal lymphatic vessels
- mLVs-CH:
-
mLVs contralateral to hematoma
- mLVs-IH:
-
mLVs ipsilateral to hematoma
- MRI:
-
Magnetic resonance imaging
- MRS:
-
Modified Rankin scale
- ROC:
-
Receiver operating characteristic
- SSS:
-
Superior sagittal sinus
- SUR:
-
Signal unit ratio
- dCLNs:
-
Deep cervical lymphatic nodes
- T2-FLAIR:
-
T2-fluid-attenuated inversion recovery
- TBI:
-
Traumatic brain injury
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Acknowledgements
We are grateful for the data support from the Second Affiliated Hospital, School of Medicine, Zhejiang University.
Funding
This study was supported by the National Natural Science Foundation of China (82371300, to SC), the National Natural Science Foundation of China (82201430, to YJF), the National Natural Science Foundation of China (82270823, to QW), the Zhejiang Provincial Natural Science Foundation of China (LY23H090014, to SC), and the Medical Health Science and Technology Project of Zhejiang Provincial Health Commission (WKJ-ZJ-2427, to SC).
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JHZ wrote the manuscript; SC, JZS, and WQ designed the manuscript; JHZ, LY, ZYZ, and XYW collected the study data; YJF, QY, HML, BRZ, and AKZ revised the manuscript; YBL, HCZ, KKW, and YZH participated in the design and coordination of the study. All authors read and approved the final version of the manuscript.
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Our study complies with the Declaration of Helsinki that the local ethics committee has approved the research protocol. All patients or their legally authorized representative signed a written informed consent.
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Supplementary Information
ESM 1
Supplemental Fig. 1 MRI image of patient NO.27 (A1, A2) are the two adjacent MRI images of patient NO.27 before treatment; (A3, A4) are the two adjacent MRI images of patient NO.27 after treatment. Supplemental Fig. 2 Relationship between outcome and suspicious factors. (a-d) Relationship between recurrence and suspicious (n=22); (e-f) Relationship between percentage change of SUR and prognostic scores (n=22). SUR: signal unit ratio. (DOCX 643 kb)
ESM 2
(DOCX 15 kb)
ESM 3
Supplemental Table 1 Basic clinical data of all subjects. (DOCX 25 kb)
ESM 4
Supplemental Table 2 The SUR of all patients. (DOCX 17 kb)
ESM 5
Supplemental Table 3 The SUR of all controls. (DOCX 15 kb)
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Zhang, J., Yu, L., Wang, X. et al. The Drainage Dysfunction of Meningeal Lymphatic Vessels Is Correlated with the Recurrence of Chronic Subdural Hematoma: a Prospective Study. Transl. Stroke Res. 16, 438–447 (2025). https://doi.org/10.1007/s12975-023-01227-4
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DOI: https://doi.org/10.1007/s12975-023-01227-4