The marginal band. A demonstration of the thickened cellular envelope of the human nail cell with the aid of lanthanum staining

Hashimoto, Ken

doi:10.1001/archderm.103.4.387

Cited by 18 publications

(11 citation statements)

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“…The trichohyaline granules tnay or tnay not be detected, although they arc always present in very stnall atnoutits (21). The tnarginal batid (20) is not fortned because the cortical cells are well protected by tnultiple layers of hair cuticles. The keratinization of Ihc culicular cells of the ctirtcx is characterized by the fortnation of stnall, round trichohyaline granules which eventually arrange along the outer side of the cell and form the cxocuticle by ctialescence (22).…”

Section: Electron Mieroscopymentioning

confidence: 97%

Appendage tumors of the skin: histogenesis and ultrastructure

Hashimoto

Kanzaki

1984

J Cutan Pathol

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Section: Electron Mieroscopymentioning

confidence: 97%

Appendage tumors of the skin: histogenesis and ultrastructure

Hashimoto

Kanzaki

1984

J Cutan Pathol

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“…6). The marginal band (8,9) or cellular envelope of comified cells (10) was already visible in the upper squamous layers. When the acrosyringium was cut in the midmalpighian layer, cell membranes of villi of the luminal cells were also thickened with the marginal band ( Fig.…”

Section: Electron Microscopymentioning

confidence: 99%

Electron Microscopic Studies of Harlequin Fetuses

Hashimoto

Dobbeleer²,

Kanzaki

1993

Pediatric Dermatology

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Four cases of harlequin fetus of various estimated gestational ages (16, 20, 21, 24 weeks) were examined by light and electron microscopy. When the epidermis was keratinized the following features were commonly found: hyperkeratosis with or without granular cells; dilated hair follicles with plugged keratin; a large number of dense or particle-cored granules in the upper malpighian layer; absence of cementsomes (lamellar bodies); large vacuoles with peripherally located laminations; large mitochondria with vesicular or membranous cristae; and early formation of the marginal band in keratinocytes and abnormal formation of the same in luminal cells of the acrosyringium. A 16-week specimen had no sign of keratinization, which made it difficult to detect these abnormalities; however, it did have large mitochondria in the keratinocytes. The mucous membrane of the lip was thickened but not keratinized.

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“…6a, b). Some of the dyskeratotic cells formed a marginal band (18) of approximately 15 nm thickness at the inner surface of the cell membrane (Fig. 6b).…”

Section: Ultrastructural Findingsmentioning

confidence: 99%

Morphogenesis of the cornoid lamella: histochemical, immunohistochemical, and ultrastructural study of porokeratosis

et al. 1991

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To elucidate the morphogenesis of cornoid lamellae (CL) in porokeratosis, skin lesions of three cases of disseminated superficial actinic porokeratosis and a case of linear porokeratosis were examined. By N-(7-dimethylamino-4-methyl-3-coumarinyl)maleimide staining, SH groups were present in the living layer of the epidermis beneath CL and irregularly disappeared at the bottom of CL, whereas SS linkages appeared in dyskeratotic cells in the living layer and in the irregularly shaped cell membranes of the horny cells. Epidermis beneath CL showed an increased and irregular involucrin expression. Ultrastructurally, the living keratinocytes contained many cytoplasmic vacuoles and had a smaller number of lamellar bodies than normal. Intercellular lamellar sheets were incompletely formed. The dyskeratotic cells and the lower horny cells contained many small vacuoles but formed a marginal band. The horny cells of CL also formed a marginal band and, further, a keratin pattern. CL may be formed by hyperproliferative atypical kertatinocytes which keratinize rapidly and irregularly and show defective desquamation due to the paucity of intercellular lamellar sheets.

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The marginal band. A demonstration of the thickened cellular envelope of the human nail cell with the aid of lanthanum staining

Cited by 18 publications

References 0 publications

Appendage tumors of the skin: histogenesis and ultrastructure

Appendage tumors of the skin: histogenesis and ultrastructure

Electron Microscopic Studies of Harlequin Fetuses

Morphogenesis of the cornoid lamella: histochemical, immunohistochemical, and ultrastructural study of porokeratosis

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