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  • 21
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cutaneous pathology 11 (1984), S. 0 
    ISSN: 1600-0560
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Five patients with mclanoacanthonia are reported. The skin lesions consisted of a single, round plaque measuring several centimeters in diameter. Histologic findings were characterized by formation within an acanthotic epidermis, of many islands of small basaloid cells and highly dendritic melanocytes. Electron microscopic examination of one lesion revealed a disturbance of melanin transfer from the highly dendritic melanocytes to the neighboring keratinoeytes.
    Type of Medium: Electronic Resource
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  • 22
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cutaneous pathology 16 (1989), S. 0 
    ISSN: 1600-0560
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A hair matrix tumor showing an unusual tumor cell arrangement was found at the base of a solitary trichoepithelioma. Coexisting with solid epithelial islands and immature hair follicle-like structures, areas of alternating epithelial cords and hand-like stroma resembling the Verocay bodies of neurilemmoma or “ripplemarks” on waves were found. In other areas myxomatous degeneration of the stroma changed the rippling into a cribriform pattern. In some parts of the tumor there was a dense melanin pigment associated with MEL5 stained melanocytes. S-100 and GDI (OKT6) antigen stains demonstrated Langerhans cells scattered in the parenchyma and less frequently in the stroma. The majority of tumor cells were considered immature pilar cortical cells because of the following: 1. HKN-6 was strongly positive; 2. a large number of melanocytes were associated with tumor cells in some foci; 3. ultrastructurally immature tumor cells, which had electron-dense tonofilaments and many desmosomes, were transformed without production of trichohyalin granules into semikeratinized cells which showed nuclear degeneration and loss of electron density in tonofilaments. This tumor, however, has not attained the degree of differentiation observed in trichoblastoma (1) another example of an immature cortical cell tumor. Squamous eddy-like or horn pearl-like foci of incomplete keratinization and large keratin-filled cysts were also present within the immature parenchyma, indicating that some immature cells were differentiating toward non-cortical cells, as found in the outer sheath. We would like to designate this tumor “rippled pattern trichomatricoma”, a new entity.
    Type of Medium: Electronic Resource
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  • 23
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cutaneous pathology 15 (1988), S. 0 
    ISSN: 1600-0560
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Specimens from a patient with epidermolysis bullosa contained many elastic globes in the dermis. Ultrastructurally they were composed of (i) medium electron-dense amorphous substances, (ii) electron-dense round structures, and (iii) fine filaments. These various elements were seldom organized into typical normal elastic fiber and, therefore, it was difficult ultrastructurally to recognize them as such or components thereof. Immunohistochemically, elastic globes were strongly reactive with NKH-1, which stains elastic microfibrils, and antibody to serum amyloid P component (anti-SAP), which binds to elastic fiber micro-fibrils. However, elastic globes were negative with EKH-4 which recognizes 50 kd keratin of amyloid keratin and cytoid bodies. These findings suggested that elastic globes have a close immunologic profile to elastic fiber microfibrils, but not that of epidermal or epithelial keratin.
    Type of Medium: Electronic Resource
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  • 24
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cutaneous pathology 13 (1986), S. 0 
    ISSN: 1600-0560
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Normal epidermis of various sites of human body was examined by N-(7-dimethyl-amino-4-methyl-3-coumarinyl)maleimidc (DACM) method for SH groups and SS linkages. The horny cells in the palm and sole showed a gradual occurrence of a SH membranous pattern, while those in other sites revealed an abrupt formation of the SH membranous pattern just above the granular layer. In the palm and sole epidermis the number of layers which exhibit membranous pattern of SH-positivity was thicker than that in the other epidermis; the low- through mid-layers of horny cells in the former sites seemed to contain not only SS-positive but also SH-positive substance at cell peripheries. The DACM staining for SS linkages showed the presence of a granular fluorescence in the cytoplasm of the granular cells of the epidermis in the human palm and sole, but not in other sites. The granular cells in human lip displayed a granular fluorescence in the cytoplasm by cither SH or SS DACM staining. All the SH- or SS-positive granular fluorescence was related to keratohyaline granules. These findings indicate that there may be some variations of the distribution pattern of the epidermal cellular proteins with SH and/or SS and a difference in chemical composition of keratohyaline granules between different anatomical sites of human body.
    Type of Medium: Electronic Resource
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  • 25
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cutaneous pathology 12 (1985), S. 0 
    ISSN: 1600-0560
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A black baby, born al full term of a normal healthy mother, showed multiple erosions and ulcers. No history of skin diseases was known in the family. A skin biopsy taken shortly after birth from an arm lesion showed subepidermal edema and cavity formation. Electron microscopy showed clumping of microfibrils and anchoring fibril-like fibers at the dermo-epidermal junction. In more severely affected areas, absence of anchoring fibrils and collagenolysis were found and the diagnosis of dystrophic epidermolysis bullosa was made. Two weeks later, the lesions healed without leaving scars and a second biopsy from the chest area revealed typical histopathology of epidermolytic hyperkeratosis.
    Type of Medium: Electronic Resource
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  • 26
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cutaneous pathology 11 (1984), S. 0 
    ISSN: 1600-0560
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 27
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 28
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 115 (1986), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A plasminogen activator (PA), Mr 72 000, was detected in conditioned medium from human melanocyte cultures by fibrin autography. The electrophoretic mobility was identical to that of tissue PA produced by Bowes melanoma cells. PA activity in human melanocyte culture medium was inhibited by anti-tissue PA IgG, but not by anti-urokinase IgG. Our results are the first to show that normal human melanocytes in culture secrete tissue plasminogen activator.
    Type of Medium: Electronic Resource
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  • 29
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 110 (1984), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Human epidermal cells were cultured with pemphigus antibody in the presence of hydrocortisone, methlprednisolone sodium succinate, dapsone and gold. Hydrocortisone and methylprednisolone reduced the production of the enzyme plasminogen activator but dapsone and gold had no effect. These results support the hypothesis that corticosteroids have dual effects on pemphigus through inhibition of plasminogen activator production by epidermal cells and suppression of pemphigus antibody production by B lymphocytes.
    Type of Medium: Electronic Resource
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  • 30
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 115 (1986), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A conditioned medium from cultured human epidermal cells was observed to inhibit the activity of exogenous urokinase. By reverse fibrin autography after SDS polyacrylamide gel electrophoresis, a plasminogen activator inhibitor was detected with a molecular weight of 46000. Using Mr- 33000 [125I]-labelled urokinase we observed the formation of an enzyme-ligand complex. The molecular weight of this complex was 79000. These results indicate that cultured human epidermal cells secrete a plasminogen activator inhibitor (urokinase inhibitor) with a molecular weight of 46000.
    Type of Medium: Electronic Resource
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