leptomeninges


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leptomeninges

 [lep″to-mĕ-nin´jēz]
(plural of leptomeninx) the two more delicate components of the meninges: the pia mater and arachnoid considered together; the pia-arachnoid. adj., adj leptomenin´geal.

lep·to·me·ninx

(lep'tō-mē'ninks), [TA]
The two delicate layers of the meninges, the arachnoid mater and pia mater (vs. the tough pachymeninx or dura mater), considered together; by this concept, the arachnoid and pia are two parts of a single layer, much like the parietal and visceral layers of a membrane or bursa; although separated by the subarachnoid space they are connected via the arachnoid trabeculae and become continuous where the nerves and filum terminale exit the subarachnoid space (the cerebrospinal fluid-filled space bounded by the leptomeninges).
See also: arachnoid mater, pia mater.

leptomeninges

/lep·to·me·nin·ges/ (lep″to-mĕ-nin´jēz) sing. leptome´ninx   the pia mater and arachnoid taken together; the pia-arachnoid.leptomenin´geal

leptomeninges

[lep′tōminin′jēz]
Etymology: Gk, leptos + meninx, membrane
the arachnoid membrane and the pia mater, two of the three layers covering the brain and spinal cord. Compare meninges.

lep·to·me·nin·ges

(lep'tō-mĕ-nin'jēz) [TA]
The two delicate layers of the meninges, the arachnoid mater and pia mater considered together.
See also: arachnoid, pia mater
Synonym(s): pia-arachnoid, piarachnoid.
[lepto- + G. mēninx, pl. mēninges, membrane]

leptomeninges

plural of leptomeninx; the two more delicate components of the meninges: the pia mater and arachnoid considered together; the pia-arachnoid.
References in periodicals archive ?
Communicating hydrocephalus may be secondary in leptomeninges or dura involvement with abnormal resorption of cerebral-spinal liquid.
These lymphomas frequently involve the leptomeninges (Figure 3), bone marrow (Figure 4) and peripheral blood.
C's MRI findings also might suggest CNS vasculitis, which affects small arteries of the cerebral and spinal cord leptomeninges and parenchyma, leading to CNS dysfunction.
Secondary CNS spread of systemic lymphoma occurs more commonly to the leptomeninges, particularly to the spinal cord, presenting with spinal cord compression syndromes.
This is also known as meningeal carcinomatosis, and can be caused by primary neuro ectodermal tumours such as neuroblastoma, tumours of the haemopoietic system such as lymphoma, or solid tumours metastasizing to the leptomeninges (e.
Cerebro deformado, con borramiento casi completo de los surcos cerebrales y leptomeninges despulidas, cubiertas por material purulento a nivel de la convexidad de los hemisferios.
Durante a fase aguda da infecção com comprometimento do SNC, descrevem-se encefalomielite com a presença de parasitas, lesões degenerativas com proliferação glial, hemorragia e infiltração linfocitária perivascular e das leptomeninges (Pittella, 1993).
WNE may also affect the leptomeninges with a clinical presentation of aseptic meningitis (viral meningitis).
114-116) as meningites bacterianas purulentas, ou, simplesmente, meningites bacterianas (MB) acometem as leptomeninges (pia-aracnoide), provocando reacao purulenta detectavel no liquido cefalorraquidiano (LCR).
Individual chapters address areas such as the neuroimmunomodulatory role of nerve growth factor in airway inflammation, antiglycolipid antibodies in autoimmune neuropathies, age-dependent differential activation profiles of glial cells by the leptomeninges during systemic inflammation, and the dual role of nitric oxide in astrocyte survival and death.
Leptomeningeal involvement--the presence of tumor cells in the leptomeninges or cerebrospinal fluid (CSF)--is the usual path of involvement after leukemia has invaded the central nervous system (CNS).