Table 3:

MR imaging features by tumor group (all patients n = 56)

GroupP Value
PBL/ETNon-ETAll Patients
No.%No.%No.%
Size (cm)<.001
 Median3.66.24.3
 Minimum1.12.71.1
 Maximum9.19.39.3
% Enhancement.17a, .80b
 None12.70011.8
 0–2538.1315.8610.7
 25–75616.2736.81323.2
 >752773.0947.43664.3
Margins<.001
 Well-defined37100.01368.45089.3
 Ill-defined00631.6610.7
Presence of edema<.001c
 Absent3286.5526.33766.1
 <2 cm from tumor margin410.81368.41730.4
 >2 cm from tumor margin12.715.323.6
Presence of cyst/necrosis.22
 Absent1232.4315.81526.8
 Present2567.61684.24173.2
Presence of calcification or hemorrhage.26
 Absent1643.2526.32137.5
 Present2156.81473.73562.5
DWI
 Bright2875.71578.94376.8
 Dark12.70011.8
 Intermediate513.5315.8814.3
 Artifact or not available38.115.347.1
Metastasis
 Intracranial12.70011.8
 Spinal513.50058.9
 Intracranial and spinal616.200610.7
 None2567.619100.04478.6
 All patients37100.019100.056100.0
  • Note:—– indicates no data available.

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

  • b Comparison of >75% versus ≤75%.

  • c Comparison of absent versus present.