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AJNR - American Journal of Neuroradiology

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Low-Field MR Imaging of Meningiomas Including Dynamic Contrast Enhancement Study: Evaluation of Surgical and Histopathologic Characteristics

S.K. Yrjänä^a, H. Tuominen^b, A. Karttunen^c, N. Lähdesluoma^a, E. Heikkinen^a and J. Koivukangas^a

^a Department of Neurosurgery, Oulu University Hospital, Oulu, Finland
^b Department of Pathology, Oulu University Hospital, Oulu, Finland
^c Department of Diagnostic Radiology, Oulu University Hospital, Oulu, Finland

View larger version (10K): [in a new window]   Fig 1. Relative intensity on FLAIR images versus surgical bleeding of tumor tissue evaluated on VAS ( = 0.49, P = .002).

View larger version (10K): [in a new window]   Fig 2. Relative intensity of tumor tissue on FLAIR images versus blood loss during surgery ( = 0.49, P = .002).

View larger version (12K): [in a new window]   Fig 3. Relative intensity of tumor tissue on FLAIR images versus grade of progesterone receptor expression evaluated on a scale of 0–3 ( = 0.59, P < .001).

View larger version (12K): [in a new window]   Fig 4. Relative intensity of tumor tissue on FLAIR images versus grade of collagen content evaluated on a scale of 0–3 ( = –0.54, P < .001).

View larger version (12K): [in a new window]   Fig 5. Relative intensity on T2-weighted images versus hardness of tumor tissue evaluated on VAS ( = –0.40, P = .012).

View larger version (8K): [in a new window]   Fig 6. Time to maximum intensity on dynamic study versus microvessel density ( = –0.60, P < .001). m indicates meningothelial; f, fibrous; s, secretory; p, psammomatous; and a, angiomatous meningioma.

View larger version (92K): [in a new window]   Fig 7. Meningothelial meningioma (A) FLAIR image (relative intensity of tumor, 1.15). B, T2-weighted image (relative intensity, 1.42). Surgical bleeding, grade 4 on VAS and blood loss, 850 mL; hardness 5 on VAS; collagen content, 0; progesterone receptor expression, 1; microvessel density, 560 microvessels/mm2. Time to maximum enhancement in dynamic imaging was 10 seconds from the time point when contrast agent arrived in the veins.

View larger version (111K): [in a new window]   Fig 8. Meningothelial meningioma (A) FLAIR image (relative intensity of tumor, 1.11). B, T2-weighted image (relative intensity, 1.05). Surgical bleeding, grade 8 on VAS and blood loss during surgery, 700 mL; hardness 4 on VAS; collagen content, 1; progesterone receptor expression, 3; microvessel density, 151 microvessels/mm2. Time to maximum enhancement in dynamic imaging was 22 seconds from the time point when contrast agent arrived in the veins.

View larger version (108K): [in a new window]   Fig 9. Fibrous meningioma (A) FLAIR image (relative intensity of tumor, 0.72). B, T2-weighted image (relative intensity, 0.83). Surgical bleeding, grade 1.5 on VAS and blood loss, 250 mL; hardness 7.5 on VAS; collagen content, 3; progesterone receptor expression, 0; microvessel density, 81 microvessels/mm2. Time to maximum enhancement in dynamic imaging was 90 seconds from the time point when contrast agent arrived in the veins.