TY - JOUR
T1 - Juvenile pilocytic astrocytomas
T2 - CT and MR characteristics
AU - Lee, Y. Y.
AU - Tassel, P. V.
AU - Bruner, J. M.
AU - Moser, R. P.
AU - Share, J. C.
PY - 1989
Y1 - 1989
N2 - Thirty-seven cases of juvenile pilocytic astrocytoma were reviewed retrospectively to determine their CT and MR characteristics. All cases occurred in pediatric patients, except for one in a young adult. There was a propensity for tumors to be located around the third and fourth ventricles. On CT the tumors were all sharply demarcated and smoothly marginated and rarely had associated edema. The lesion tended to be round or oval. The tumor matrix was most often hypo- or isodense with marked enhancement. Cyst formation, either micro- or macrocystic or combined, was frequently observed, and tumor calcification occurred occasionally. On MR the tumors appeared hypo- or isointense on T1-weighted images and hyperintense on T2-weighted images. The radiologic appearances of juvenile pilocytic astrocytomas are quite characteristic. By using age of presentation, typical location, configuation, and enhancement patterns, the presurgical diagnosis of juvenile pilocytic astrocytoma can be made with a high index of confidence.
AB - Thirty-seven cases of juvenile pilocytic astrocytoma were reviewed retrospectively to determine their CT and MR characteristics. All cases occurred in pediatric patients, except for one in a young adult. There was a propensity for tumors to be located around the third and fourth ventricles. On CT the tumors were all sharply demarcated and smoothly marginated and rarely had associated edema. The lesion tended to be round or oval. The tumor matrix was most often hypo- or isodense with marked enhancement. Cyst formation, either micro- or macrocystic or combined, was frequently observed, and tumor calcification occurred occasionally. On MR the tumors appeared hypo- or isointense on T1-weighted images and hyperintense on T2-weighted images. The radiologic appearances of juvenile pilocytic astrocytomas are quite characteristic. By using age of presentation, typical location, configuation, and enhancement patterns, the presurgical diagnosis of juvenile pilocytic astrocytoma can be made with a high index of confidence.
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U2 - 10.2214/ajr.152.6.1263
DO - 10.2214/ajr.152.6.1263
M3 - Article
C2 - 2718863
AN - SCOPUS:0024382987
SN - 0361-803X
VL - 152
SP - 1263
EP - 1270
JO - American Journal of Roentgenology
JF - American Journal of Roentgenology
IS - 6
ER -