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. 2024 Mar 29;14(7):1044. doi: 10.3390/ani14071044

Table 1.

MRI features a summary of meningiomas and canine extra-axial histiocytic sarcoma.

MRI Feature Feline
Meningioma [9,26,41,49]
(Proportion) *		 Canine Meningioma [2,7,10,26,30,31,32,33,39,40,47,48,50,51,52,53,54]
(Proportion) *		 Canine Histiocytic
Sarcoma [2,33,52,53,54,55,56]
(Proportion) *
Predominant T1W Signal
Intensity

  • Isointense

 42% 33% (12–82%) 25% (17–100%)

  • Hypointense

 69% (58–100%) 33% (12–88%) 83% (75–100%)

  • Hyperintense

 NR 19% (16–20%) NR
Predominant T2W Signal
Intensity

  • Isointense

 20% (9–33%) 24% (12–44%) 40% (14–50%)

  • Hypointense

 3% 8% (2–14%) 33% (29–50%)

  • Hyperintense

 80% (76–88%) 78% (44–100%) 24% (17–47%)
Predominant PDW Signal
Intensity

  • Isointense

 6% 40% (12–68%) 71%

  • Hypointense

 6% 88% NR

  • Hyperintense

 88% 66% (32–100%) NR
Contrast Enhancement
Present		 100% 100% (94–100%) 100% (present in all cases)
Contrast Enhancement
Uniformity, Severity,
Pattern

  • Homogeneous

 ~50% 75% (39–78%) 52% (43–60%)

  • Heterogeneous

 ~50% 61% (34–88%) 39% (29–57%)

  • Marked

 91% 86% (78–100%) 69% (67–71%)

  • Mild-moderate

 9% 17% (12–22%) 31% (22–33%)

  • Ring-like a

 12% 11% (2–22%) 14% (10–18%)
Calvarial Hyperostosis
Present		 73% 25% (23–27%) 12%
Cystic Regions Present 6% 22% (13–32%) 15% (12–17%)
Dural Tail Present 64% 25% (22–91%) 53% (29–100%)
Mass Effect Present 97% 96% (75–100%) 100% (present in all cases)
Peritumoral Edema Present 79%

  • Mild in 58%

 89% (60–100%)

  • Severe in 40–50%

 100% (92–100%)

  • Severe in 60–72%

NR = not reported. * When data extracted from multiple studies, median and ranges provided. a This category considered subset of mild/moderate heterogenous enhancement.

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