MR imaging characteristics of pilomyxoid astrocytomas.
AJNR Am J Neuroradiol
; 24(9): 1906-8, 2003 Oct.
Article
in En
| MEDLINE
| ID: mdl-14561626
ABSTRACT
BACKGROUND AND PURPOSE:
Pilomyxoid astrocytoma (PMA) is a recently described tumor that typically occurs in the chiasmatic-hypothalamic region in young children and has unique histopathologic and clinical characteristics. These tumors have been previously diagnosed as pilocytic astrocytoma (PA). PMA appears to have a higher rate of recurrence and CSF dissemination than typical PA.METHODS:
We analyzed MR findings in four patients with PMA and compared them with those of typical chiasmatic-hypothalamic PA.RESULTS:
MR findings of PMA were chiasmatic or hypothalamic enhancing solid tumor with hydrocephalus, highly homogeneous T2 signal intensity that extended into the deep white and gray matter, and CSF dissemination.CONCLUSION:
Larger series are needed before the MR imaging findings of chiasmatic or hypothalamic enhancing solid tumor with hydrocephalus, highly homogeneous T2 signal intensity extending into the deep white and gray matter, and CSF dissemination can be used in the differential diagnosis of such tumors.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Optic Chiasm
/
Astrocytoma
/
Magnetic Resonance Imaging
/
Optic Nerve Neoplasms
/
Hypothalamic Neoplasms
Type of study:
Diagnostic_studies
Limits:
Child, preschool
/
Female
/
Humans
/
Infant
/
Male
Language:
En
Journal:
AJNR Am J Neuroradiol
Year:
2003
Type:
Article
Affiliation country:
United States