meningeal enhancement
Magnetresonanztomographie
des Kopfes (T1w mit Kontrastmittel, coronar) bei Liquorunterdrucksyndrom nach PDA. Typisch ist die starke Signalintensität der Meningen nach Kontrastmittel.
Fokale
Meningeosis carcinomatosa bei Mammakarzinom in der Magnetresonanztomographie (T1w axial mit Kontrastmittel). Man erkennt die fokale Anreicherung in den Sulci als Zeichen einer arachnoidalen Ausbreitung rechts (links im Bild).
Meningeales
diffuses Kontrastmittelenhancement nach lumbaler Liquorleckage.
Extramedullary
hematopoiesis of the falx. Diffuse and intense high signal of the lesion
Polycystic
subdural hygroma associated with immunoglobulin G4-related intracranial hypertrophic pachymeningitis: a case report. Brain MRI (gadolinium enhanced T1-wighted images) on admission. MRI revealed polycystic subdural hygroma, hematoma, and diffuse thickening of the dura mater when probed using contrast enhancement (MRI, magnetic resonance imaging)
Extrapulmonary
tuberculosıs: an old but resurgent problem. Axial FLAIR (a), pre-contrast (b) axial T1 weighted, and post-contrast (c) axial T1 weighted MR images of a 21-year-old male. Axial FLAIR image shows high signal intensity caused by edema and inflammation in the left frontal lobe (star). In both anterior frontal regions (red arrows) and right parietal area (blue arrows) are seen subdural abscesses. In addition, MR images demonstrate meningeal enhancement and thickening (arrowheads)
Extramedullary
hematopoiesis of the falx. High signal lesion centered on the falx entering the sulci
Long survival
of primary diffuse leptomeningeal gliomatosis following radiotherapy and temozolomide: case report and literature review. Note Gd-enhanced supra- and in-fratentorial meningeal thickenings of the brain in sagittal T1-W image (a). Prior to ra-diochemotherapy, T1-WI reveals lep-tomeningeal Gd-enhancement (b) and T2-WI shows edema of the myelon on levels C7, T1-2 and T5-6 due to minor tumor extensions in the adjacent spinal cord (c). Following radiochemotherapy, T1-WI displays reduced leptomeningeal Gd-enhancement (d) while T2-WI shows less myelon spinal edema on those levels (e).
Transcortical
approaches to large intraventricular tumors: a prospective case series of 20 patients. A large left sided intraventricular choroid plexus carcinoma in a 3-year-old female patient. a–c The preoperative axial, coronal, and sagittal contrast-enhanced brain MRI study. d–f The postoperative axial, coronal, and sagittal contrast-enhanced brain MRI study. Total excision of the tumor was achieved following a left posterior parietal trans-cortical approach
Anti-NMDAR
encephalitis with simultaneous hypertrophic pachymeningitis in a 68-year-old male: a rare case report. Magnetic resonance imaging of the brain: a thickening of dura mater localized at the left tentorium cerebelli, left cerebral hemisphere, and cerebral falx; the thickening dura mater was characterized by an intense contrast enhancement after the administration of gadolinium (a, b). Magnetic resonance venography: no obvious indication of the left internal jugular vein, and both of the left transverse sinus and the sigmoid sinus was slim with local stenosis; there was also increased cortical drainage in the left cerebral hemisphere (c)
Neurosyphilis
- Clinically dementia and radiologically meningoencephalitis. Post-contrast T1WI MR brain showing increased meningeal vascularity.
Neurosyphilis
- Clinically dementia and radiologically meningoencephalitis. Coronal post-contrast FLAIR showing meningeal enhancement as shown by white arrows.
Neurosyphilis
- Clinically dementia and radiologically meningoencephalitis. Coronal post-contrast FLAIR showing meningeal enhancement as shown by white arrows.
Intrakranielle
Meningeosis carcinomatosa bei Lungenkarzinom: Oben FLAIR und T1 mit Kontrastmittel axial, und DWI axial und T1 mit Kontrastmittel koronar. Man erkennt gut die deutliche, flächige Kontrastmittelaufnahme der Meningen.
Meningeosis
carcinomatosa im Spinalkanal in der Computertomographie als Kontrastmittelaufnahme um das Myelon zu erkennen.
Ureaplasma
parvum meningitis following atypical choroid plexus papilloma resection in an adult patient: a case report and literature review. A Enhanced preoperative MRI showing a left temporal lobe-lateral ventricle tumor. B CT scans on the first day after surgery demonstrating that the tumor had been removed and replaced with CSF, with the opening of the left lateral ventricles. C Enhanced MRI images on the 43rd day after surgery demonstrating complete tumor resection
Meningeal enhancement is a generic term related to the enhancement of the membranes that envelop the brain and spinal cord. Due the anatomical features, this enhancement can be divided in two subtypes:
- leptomeningeal enhancement (pial or pial-arachnoid enhancement)
- dural (pachymeningeal) enhancement (dura-arachnoid enhancement )
Combined pachymeningeal and leptomeningeal enhancement may occur, usually being focal and associated with a vascularized extra-axial tumor (e.g. metastases and lymphoma) or inflammatory process (e.g. TB and sarcoidosis).
Terminology
It is important to note that the thin arachnoid membrane is attached to the inner surface of the dura mater, and so the pachymeningeal pattern of enhancement can also be described as a dura-arachnoid enhancement .
On the other hand, the enhancement of the brain surface is also called as pial or pial-arachnoid enhancement, often referred to as leptomeningeal enhancement .
Siehe auch:
- Meningeosis neoplastica
- dural enhancement
- Neurosarkoidose
- Vaskulitis
- Meningitis
- Liquorunterdrucksyndrom
- leptomeningeale Kontrastmittelanreicherungen
- zerebrale Kryptokokkose
- Liquorfistel
- meningeales Hämangioperizytom
- extramedulläre Blutbildung intrakraniell
- primäre diffuse leptomeningeale Gliomatose (PDLG)
- meningeal leukemia
- meningeale Sarkoidose
- tuberkulöse Meningitis
- hyperintense Meningen
- Meningeosis lymphomatosa
und weiter:
Assoziationen und Differentialdiagnosen zu meningeale Kontrastmittelaufnahme:
