Related Experiment Videos
Hypertensive pontine microhemorrhage
Jee-Hyang Jeong1, Soo Jin Yoon, Sue J Kang
1Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
Background And Purpose:
This study investigated whether the topography of hypertensive pontine microhemorrhages (hPMHs) resembles that of larger primary pontine hemorrhages.
Methods:
Sixty-nine consecutive patients with small-vessel disease underwent imaging with gradient-echo MRI, and 27 patients with hPMH were detected. Lesion size and location along the rostrocaudal (longitudinal), lateral (coronal), and anteroposterior (sagittal) axes were determined.
Results:
A total of 52 hPMHs were identified in the 27 patients (mean, 1.93+/-2.4 per patient). The lesions showed a nonrandom distribution, with a propensity to occur in the middle pons in the rostrocaudal axis, posterior half of the basis pontis in the anteroposterior axis, and central subdivision within the lateral axis. The area of hPMH ranged from 1.3 to 19.0 mm2 (mean, 5.06+/-3.72 mm2). The size of hPMH did not vary as a function of lesion location.
Conclusions:
Previous studies reported that primary pontine hemorrhages tend to occur in the middle pons and at the junction of basis pontis and tegmentum. Therefore, topographical correspondences between large and small pontine hemorrhages may provide evidence that the 2 lesions share some etiological basis. Further investigation may determine whether hPMHs portend future symptomatic primary pontine hemorrhages.
Insights
Hypertensive pontine microhemorrhages (hPMHs) share topographical similarities with larger primary pontine hemorrhages, suggesting a potential common etiological basis. Further research may explore if hPMHs predict future symptomatic hemorrhages.
Area of Science:
- Neurology
- Radiology
- Vascular Medicine
Background:
- Hypertensive microhemorrhages in the pons (hPMHs) are small lesions.
- The topographical relationship between hPMHs and larger primary pontine hemorrhages is not well understood.
Purpose of the Study:
- To investigate if the topography of hPMHs resembles that of larger primary pontine hemorrhages.
- To explore potential shared etiological bases for different sizes of pontine hemorrhages.
Main Methods:
- Gradient-echo MRI was used to image 69 patients with small-vessel disease.
- The size and location (rostrocaudal, lateral, anteroposterior axes) of 27 detected hPMHs were analyzed.
Main Results:
- A total of 52 hPMHs were identified, with a mean of 1.93 per patient.
- Lesions exhibited a nonrandom distribution, favoring the middle pons, posterior basis pontis, and central lateral subdivision.
- hPMH size did not significantly correlate with lesion location.
Conclusions:
- The topographical distribution of hPMHs aligns with previously reported locations for larger primary pontine hemorrhages.
- These topographical similarities suggest a potential common etiological origin.
- Further studies are warranted to determine if hPMHs can predict future symptomatic primary pontine hemorrhages.