leptomeningeal enhancement

Magnetresonanztomographie

des Kopfes (T1w mit Kontrastmittel, coronar) bei Liquorunterdrucksyndrom nach PDA. Typisch ist die starke Signalintensität der Meningen nach Kontrastmittel.

Wikipedia • CC BY-SA 3.0

Meningeosis

carcinomatosa im Spinalkanal in der Computertomographie als Kontrastmittelaufnahme um das Myelon zu erkennen.

Wikipedia • CC BY-SA 3.0

Leptomeningeal

enhancement • Leptomeningeal enhancement - Ganzer Fall bei Radiopaedia

Gaillard F, Leptomeningeal enhancement. Case study, Radiopaedia.org (Accessed on 27 Oct 2023) https://doi.org/10.53347/rID-9692 • CC by-nc-sa 3.0 (modified)

Leptomeningitis

• Tubercular meningitis with tuberculomas - Ganzer Fall bei Radiopaedia

Jha, P. Tubercular meningitis with tuberculomas. Case study, Radiopaedia.org. (accessed on 20 Oct 2022) https://doi.org/10.53347/rID-8853 • CC by-nc-sa 3.0 (modified)

Leptomeningeal

metastases • Leptomeningeal metastases - Ganzer Fall bei Radiopaedia

Bhuta, S. Leptomeningeal metastases. Case study, Radiopaedia.org. (accessed on 23 Oct 2022) https://doi.org/10.53347/rID-6110 • CC by-nc-sa 3.0 (modified)

Leptomeningeal

metastases • Leptomeningeal lymphoma - Ganzer Fall bei Radiopaedia

Gaillard, F. Leptomeningeal lymphoma. Case study, Radiopaedia.org. (accessed on 23 Oct 2022) https://doi.org/10.53347/rID-2627 • CC by-nc-sa 3.0 (modified)

Hydrocephalus

• Diffuse leptomeningeal glioneuronal tumor - Ganzer Fall bei Radiopaedia

Jones, J. Diffuse leptomeningeal glioneuronal tumor. Case study, Radiopaedia.org. (accessed on 22 Oct 2022) https://doi.org/10.53347/rID-32561 • CC by-nc-sa 3.0 (modified)

Leptomeningitis

• Bacterial meningitis - septation of subarachnoid spaces - Ganzer Fall bei Radiopaedia

Haouimi, A. Bacterial meningitis - septation of subarachnoid spaces. Case study, Radiopaedia.org. (accessed on 20 Oct 2022) https://doi.org/10.53347/rID-97444 • CC by-nc-sa 3.0 (modified)

Radiopaedia • CC-by-nc-sa 3.0 • de

Leptomeningeal enhancement refers to a diffuse or focal gyriform or serpentine enhancement that can be seen in the following conditions:

Diffuse

meningitis
- pyogenic meningitis
- viral meningitis
- tuberculous meningitis (can also be focal)
- CNS cryptococcal infection
- coccidioidal meningitis (can also be focal)
- primary amoebic meningoencephalitis
encephalitis
tumors
- Primary
  - diffuse leptomeningeal glioneuronal tumor
- Secondary
  - Meningeal carcinomatosis-leptomeningeal carcinomatosis (e.g. from carcinoma of breast or lung, melanoma, ependymoma)
hemorrhage (e.g. post-subarachnoid)
post uncomplicated lumbar puncture (rare, less than 5%)
granulomatous conditions
- neurosarcoidosis (can also be focal)
post-operative (late finding)
post-traumatic (late finding)

Focal

leptomeningeal carcinomatosis (e.g. from carcinoma of breast or lung, melanoma)
post-ictal hyperemia
infarction: subjacent acute (leptomeningeal collaterals) or subacute
lymphoma
meningitis (e.g. tuberculous)
encephalitis
neurosarcoidosis
postoperative scar
vasculitis
- neurosyphilis
Sturge-Weber syndrome

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Terminology

The enhancement of the brain surface is known as pial or pial-arachnoid enhancement and often referred to as leptomeningeal enhancement .

Conversely, as the thin arachnoid membrane is attached to the inner surface of the dura mater, the pachymeningeal pattern of enhancement can also be described as a dural-arachnoid enhancement .