Abstract
Brainstem lesions can arise from the midbrain, pons, or medulla. Oftentimes, these lesions will affect adjacent nuclei/pathways or result in mass-effect within the posterior fossa. Imaging of brainstem lesions can be achieved by utilizing multiple modalities, each of which offer modality-specific advantages and disadvantages. Imaging may include magnetic resonance imaging (MRI), computed tomography (CT), and/or positron emission tomography (PET) imaging. Ultrasound imaging may also be utilized to evaluate the posterior fossa of newborns. The density of the skull base typically presents an obstacle for imaging of the posterior fossa. MRI is the modality of choice for the evaluation and characterization of brainstem lesions. Imaging characteristics of different brainstem lesions can provide invaluable pretreatment information to aid in the diagnosis, assess impact on adjacent structures, and assist in treatment planning. When evaluating neoplastic lesions, imaging may also serve to distinguish between neoplastic progression versus development of post-treatment changes. In this chapter, we provide an overview of the typical imaging appearance of common neoplastic and non-neoplastic lesions within the brainstem.
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Abbreviations
- 18F-FDG PET:
-
18F-2-fluoro-2-deoxy-D-glucose positron emission tomography
- 18F-FET PET:
-
18F-fluoro-ethyl-tyrosine positron emission tomography
- 1H-MRS:
-
1H-MR-spectroscopy
- 1H-MRSI:
-
1H-Magnetic resonance spectroscopic imaging
- 3D:
-
Three-dimensional
- ADC:
-
Apparent diffusion coefficient
- ADEM:
-
Acute disseminated encephalomyelitis
- ASL:
-
Arterial spin labeling
- AVM:
-
Arterio-venous malformation
- BBB:
-
Blood brain barrier
- BSCMs:
-
Brainstem cavernous malformations
- BSGs:
-
Brainstem Gliomas
- b-SSFP:
-
Balanced steady-state free procession
- CBF:
-
Cerebral blood flow
- CBV:
-
Cerebral blood volume
- Cho:
-
Choline
- CISS:
-
Constructive interference in steady state CN: cranial nerve
- CNS:
-
Central nervous system
- CPA:
-
Cerebellopontine angle cistern
- Cr:
-
Creatine
- CSF:
-
Cerebral spinal fluid
- CT:
-
Computed tomography
- DCE:
-
Dynamic contrast enhancement
- DIPG:
-
Diffuse intrinsic pontine glioma
- DRO:
-
Dentate-rubro-olivary
- DSC:
-
Dynamic susceptibility contrast
- DTI:
-
Diffusion tensor imaging
- DTT:
-
Diffusion tensor tractography
- DVA:
-
Developmental venous anomaly
- DWI:
-
Diffusion weighted imaging
- DWI/DTI:
-
Diffusion weighted or tensor imaging
- ED:
-
Emergency department
- EV71:
-
Enterovirus 71
- FA:
-
Fractional anisotropy
- FIESTA:
-
Fast imaging employing steady-state acquisition
- FLAIR:
-
Fluid-attenuated inversion recovery
- HOD:
-
Hypertrophic olivary degeneration
- HSV1:
-
Herpes simplex virus 1
- HU:
-
Hounsfield units
- IAC:
-
Internal auditory canal
- ICH:
-
Intracranial hemorrhage
- ION:
-
Inferior olivary nucleus
- IV:
-
Intravenous
- MRI:
-
Magnetic resonance imaging
- MS:
-
Multiple sclerosis
- MTT:
-
Mean transit time
- NAA:
-
N-acetylaspartate
- ODS:
-
Osmotic demyelination syndrome
- PCNSL:
-
Primary central nervous system lymphoma
- PET:
-
Positron emission tomography
- PPH:
-
Primary pontine hemorrhage
- PWI:
-
Perfusion weighted imaging
- rCBV:
-
Relative cerebral blood volume
- RE:
-
Rhombencephalitis
- SWI:
-
Susceptibility-weighted imaging
- TB:
-
Tuberculosis
- TTP:
-
Time-to-peak
- WHO:
-
World Health Organization
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Flores, M.A., Blitz, A.M., Gujar, S.K., Huisman, T.A.G.M. (2020). Imaging of Brainstem Lesions. In: Jallo, G., Noureldine, M., Shimony, N. (eds) Brainstem Tumors. Springer, Cham. https://doi.org/10.1007/978-3-030-38774-7_3
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DOI: https://doi.org/10.1007/978-3-030-38774-7_3
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