leptomeninges


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Related to leptomeninges: meningitis, pachymeninges, Leptomeningeal carcinomatosis

leptomeninges

[¦lep·tō·mə′nin·jēz]
(anatomy)
The pia mater and arachnoid considered together.
References in periodicals archive ?
Gram-staining of brain and skin tissue (examination performed at CDC) showed gram-negative cocci and gram-positive bacilli in leptomeninges and vascular lumens.
Whereas secondary CNS lymphoma more commonly involves the leptomeninges, primary CNS lymphoma may present as a parenchymal lesion not shedding malignant cells into the CSF.
These lymphomas frequently involve the leptomeninges (Figure 3), bone marrow (Figure 4) and peripheral blood.
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.
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).
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).
Brain malformations are very similar to those reported in WWS and MEB and include cerebral and cerebellar micropolygyria, hydrocephalus, fibroglial proliferation of the leptomeninges, focal interhemispheric fusion, and hypoplasia of the corticospinal tracts (154, 155).
Primary leptomeningeal melanomatosis is a rare variant of malignant melanoma of the central nervous system that arises directly from the melanocytes within the leptomeninges.
Neoplastic meningitis refers to the multifocal seeding of metastatic malignant cells along the leptomeninges of the central nervous system.