leptomeninges


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leptomeninges

[¦lep·tō·mə′nin·jēz]
(anatomy)
The pia mater and arachnoid considered together.
References in periodicals archive ?
In our patient, it appeared that the meningeal component of the Cryptococcal infection involved the perivascular spaces at the base of the brain and cerebellar leptomeninges.
Nevertheless, the most typical feature of PXA tumors is their close contact and attachment to leptomeninges and most of them have syringomyelic cavities, with no wall enhancement (1,6).
She was sent for a brain MRI that revealed metastasis to the brain, which occurs in 10-16% of patients with stage IV breast cancer, arising within the parenchyma or the leptomeninges.
There are only a few reports in which colloid cysts are described in other locations such as the fourth ventricle, pituitary gland, leptomeninges, cranial vault, brain-stem, cerebellum and the suprasellar region.
25) Abnormal enhancement may extend inferiorly along the leptomeninges surrounding the spinal cord and spinal nerves, potentially causing arachnoiditis and subarachnoid block20 (Figures 13,14).
Positivity was intense in choroid plexus cells, inner and outer glia limitans, and leptomeninges and was moderate in ependymocytes and the perivascular endfeet.
CSF seeding of the tumour was detected along the ventral surface of the brainstem and on the cerebellopontine angle cisterns, the anterolateral temporal lobes and posterior fossa, the leptomeninges and the cauda equina of the spine (Fig.
Decreased blood flow in the main vessels of the brain would result in the formation of collateral vasculature at the apex of the carotid, on the cortical surface, leptomeninges and branches of the external carotid artery.
Durante a necropsia, foi observada congestao difusa das leptomeninges no suino A, enquanto, no animal B, nao havia alteracoes macroscopicas dignas de nota.
The number of lesions and the degree of involvement of parenchyma and leptomeninges are also more visible by MRI than by CT scan.
2] The PVS dilatation reflects impairment of CSF re-absorption owing to accumulation of GAGs in the vacuolated gargoyle cells [3] of the leptomeninges.
La disminucion del flujo sanguineo en las arterias principales de la circulacion anterior del cerebro lleva al desarrollo compensatorio de una vasculatura colateral formada por pequenos vasos localizados cerca a la punta de la carotida, sobre la superficie cortical, leptomeninges y ramas de la arteria carotida externa que irrigan la duramadre y la base del craneo.