J Korean Radiol Soc.  1994 May;30(5):807-810.

Normal Variation of Focal T2 Hyperintensities in Anterior Parietal Periventricular white Matter: Another 'Terminal Zones of IV!yelination'

• Lee JH
• Park JO
• Woo JH
• Ki TS
• Lee DY

Abstract

PURPOSE
It has been known that there are several areas of T2 hyperintensities in normal white matter of brain, such as terminal zones of myelination, ependymitis granularis, ones of posterior internal capsule, and perivascular space. The aim of our study is to demonstrate another region of T2 hyperintensities in normal pediatric age group.
MATERIALS AND METHODS
We have studied brain MR for 10 normal volunteers and 35 patients without having intracranial lesions in pediatric age group(3-19 years).
RESULTS
In 5 among 45 cases, focal T2 hyperintensities were seen in the parietal periventricular white matter beneath the postcentral gyri. They were noted as poorly defined, 5--10mm sized areas of increased signal intensities on T2 weighted axial images. They were also characterized by bilateral, posteromedially oriented, short band-like or oval areas. Interestingly, they were directly continuous with the T2 hyperintensity of posterior internal capsule. In spite of the relatively high frequency in the pediatric population as in our study, this finding has not been reported in the asymptomatic adults.
CONCLUSION
The results show that the bilateral anterior parietal hyperintense areas may be another terminal zones of delayed myelination affecting the parietopontine tract. They should be differentiated from pathologic T2 hyperintensities by their characteristic findings.

MeSH Terms

Adult
Brain
Healthy Volunteers
Humans
Internal Capsule
Myelin Sheath
Rabeprazole*