Name : Morteza
Family : Sanei Taheri
Affiliation :Radiology Department,Shohada Tajrish Hospital,SBMU
Academic Degree : Associate Professor of Radiology
Resident : Niayesh Keshvari
Gender : Male
Age : 39
a 39 y/o man with recurrent headache
Images demonstrate high signal mass posterior to optic tract on FLAIR &T2 W and low signal on T1 W that reveals enhancement in postcontrast study.
Hydrocephaly and diffusion restriction is not visualized .
Discussion (Related Text)
Low grade glioma is an uncommon diagnosis. Patients are younger than those with high grade glioma and most commonly present with seizures. The diagnostic modality of choice is MRI. On MRI, low-grade gliomas usually appear as low signal on T1 weighted imaging and a well-defined area of high signal on T2, often with a more extensive abnormality than seen on CT. FLAIR sequences attenuate the signal from CSF and can better define peri-ventricular lesions. The ultimate behaviour of these tumours is not benign. The natural history is of serial accumulation of genetic abnormalities resulting in malignant transformation and, ultimately, death.
Price SJ. Advances in imaging low grade gliomas. Advances and Technical Standards in Neurosurgery, 2009;35:1-34.