Pontoserebellar köşe tümörlerinde dinamik kontrastlı manyetik rezonans görüntüleme bulguları
Ahmet Kemal Fırat, Hakkı Muammer Karakaş, Bayram Kahkaman, Yezdan Fırat, Tayfun Altınok, Ahmet Kızılay
FREE FULL TEXT Anahtar Kelimeler: Pontoserebellar köşe/patoloji; manyetik rezonans görüntüleme.
Dynamic contrast-enhanced magnetic resonance imaging findings of mass lesions of the pontocerebellar angle
Ahmet Kemal Fırat, Hakkı Muammer Karakaş, Bayram Kahkaman, Yezdan Fırat, Tayfun Altınok, Ahmet Kızılay
Objectives: The differential diagnosis of mass lesions
of the pontocerebellar angle is not always possible by
conventional magnetic resonance imaging (MRI). In
this study, we investigated the role of dynamic contrastenhanced
MRI in the differential diagnosis of acoustic
neurinoma, meningioma, and paraganglioma.
Patients and Methods: Twelve patients (8 females, 4
males; mean age 47.5 years; range 8 to 71 years)
whose diagnoses were acoustic neurinoma (n=3),
paraganglioma (n=5), and meningioma (n=4) were
evaluated by simultaneous conventional and dynamic
contrast-enhanced MRI. Prior to postcontrast T1-
weighted images, dynamic MRI was obtained. On
these images, maximum contrast enhancement (Cmax)
and time to peak enhancement (Tmax) were calculated
at 15 different time points. Time-signal intensity curve
patterns of the lesions were compared.
Results: According to the four main time-signal intensity
curve patterns described in the literature, acoustic
neurinomas, meningiomas, and paragangliomas
exhibited type C, type A-B, and type A curve patterns,
respectively.
Conclusion: Our results suggest that dynamic contrast
MRI may have an additional but limited role in
the differential diagnosis of extra-axial intracranial
tumors such as those of the pontocerebellar angle. Key words: Cerebellopontine angle/pathology; magnetic resonance imaging.
Ahmet Kemal Fırat, Hakkı Muammer Karakaş, Bayram Kahkaman, Yezdan Fırat, Tayfun Altınok, Ahmet Kızılay. Dynamic contrast-enhanced magnetic resonance imaging findings of mass lesions of the pontocerebellar angle. Kulak Burun Bogaz Ihtis Derg. 2007; 17(4): 217-223
Corresponding Author: Ahmet Kemal Fırat |
