RT Journal Article
SR Electronic
T1 MR Imaging Characteristics of Pilomyxoid Astrocytomas
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 1906
OP 1908
VO 24
IS 9
A1 Atilla Arslanoglu
A1 Bayram Cirak
A1 Alena Horska
A1 James Okoh
A1 Tarik Tihan
A1 Leslie Aronson
A1 Anthony M. Avellino
A1 Peter C. Burger
A1 David M. Yousem
YR 2003
UL http://www.ajnr.org/content/24/9/1906.abstract
AB 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.