Table 2 Frequency distribution of qualitative MRI features within our cases
Qualitative MR Features | IOIP (n = 32) | Lymphoma (n = 21) | Total (n = 53) | |
|---|---|---|---|---|
No. (%) | No. (%) | No. (%) | ||
Laterality | Unilateral | 24 (75) | 19 (90.5) | 43 (81.1) |
Bilateral | 8 (25) | 2 (9.5) | 10 (18.9) | |
Location | Extraconal | 15 (46.9) | 8 (38.1) | 23 (43.4) |
Intraconal/Extraocular | 17 (53.1) | 4 (19) | 21 (39.6) | |
Intraocular | 0 (0) | 9 (42.9) | 9 (17) | |
Margin | Well-defined | 27 (84.4) | 3 (14.3) | 30 (56.6) |
Ill-defined | 5 (15.6) | 18 (85.7) | 23 (43.4) | |
Signal intensity on T2 WI | Hyperintense | 2 (6.3) | 9 (42.9) | 11 (20.8) |
Isointense | 11 (34.4) | 8 (38.1) | 19 (35.8) | |
Hypointense | 19 (59.3) | 4 (19) | 23 (43.4) | |
DWI appearance | Restricted | 0 (0) | 19 (90.5) | 19 (35.8) |
Non-restricted | 32 (100) | 2 (9.5) | 34 (64.2) | |
Degree of enhancement | Moderate | 7 (21.9) | 18 (85.7) | 25 (47.2) |
Intense | 25 (78.1) | 3 (14.3) | 28 (52.8) | |
Orbital preseptal space involvement | Yes | 4 (12.5) | 15 (71.4) | 19 (35.8) |
No | 28 (87.5) | 6 (28.6) | 34 (64.2) | |
Findings suggestive of sinusitis | Yes | 26 (81.2) | 4 (19) | 30 (56.6) |
No | 6 (18.8) | 17 (81) | 23 (43.4) | |