Table 4:

MR imaging features by tumor group after excluding pineoblastomas (n = 29)

GroupP Value
ETNon-ETAll Patients
No.%No.%No.%
Size (cm).95
 Median5.76.26.1
 Minimum3.62.72.7
 Maximum9.19.39.3
% Enhancement.68a
 None000000
 0–25220315.8517.2
 25–75550736.81241.4
 >75330947.41241.4
Margins.068
 Well-defined10100.01368.42379.3
 Ill-defined00631.6620.7
Presence of edema.24b
 Absent550526.31034.5
 <2 cm from tumor margin4401368.41758.6
 >2 cm from tumor margin11015.326.9
Presence of cyst/necrosis.53
 Absent00315.8310.3
 Present101001684.22689.7
Presence of calcification or hemorrhage.11
 Absent660526.31137.9
 Present4401473.71862.1
DWI
 Bright9901578.92482.8
 Dark000000
 Intermediate00315.8310.3
 Artifact or not available11015.326.9
Metastasis
 Intracranial000000
 Spinal000000
 Intracranial and spinal000000
 None1010019100.029100
 All patients10100.019100.029100.0
  • Note:—  – indicates no data available.

  • a Comparison of none versus 0%–25% versus 25%–75% versus >75%.

  • b Comparison of absent versus present.