No abstract available.
Candida albicans* ; Candida* ; DNA*

BACKGROUND: Metallothioneins(MTs) are ubiquitous low molecular weight cytosolic proteins with high contents of cystein that xhibit a selective binding affinity for zinc, copper and other group II heavy metal ions. In additi~on to the sequestration function and detoxification action, MTs probably participate in the cellirlar protection against. ionizing radiation and alkylating agent cytotoxicity and in cellular pn:liferation. OBJECT: The objective of this study was to evaIuate the expression of MTs and to clarify t.heir role in carcinogenesis and/or biological behaviour in the neoplasms of ectoderrnal origin. METHODS: We performed immunohistochemical studies on the surgical specimens of rnalignant rnelanoma and squamous cell carcinoma and basal cell carcinoma. The results were compared with the normal skin and mu osa and hair t,issues and raf't-on culture tissues of skin and mucosal keratinocytes. RESULTS: 1) MTs were strongly expressed in epidermal basal cells of the normal skin and raft-on cultured artificial skin They were also rnore weakly expressed in epithelial basal cells of the normal mucosa and raft on cultured artificial mucosa and in matrix cells of the normal hair. 2) In rnalignant melanoma, MTs were meaningfully expressed, i.e., a strong expression was seen in the lesions showing a rapid vertical growth phase with fatal out,comes, but a weak expression in the cases whose precursor lesions were thought as dysplastic nevi, compared to the negative finding of norrnal melanocyt,es. The strong expression in a case of congenit.al rnelanocyt.ic nevus is considered as the activation of nevoid melanocytes. 3) MTs were weakly expressed in squarnous cell carcinoma with a diffuse aattern within the tumor mass. St,rong expression of MTs was particularly apparent in the poorl. differentiated squamous cell carcinoma and at the growing border of well differentiated squamous cell carcinoma. 4) In basal cell carcinoma, MTs were rather weakly expressed in solid cireumscribed types with a diffuse pattern and in cystic type with a patchy pattern. However they were not expressed in the solid infiltrative type. CONCLUSION: From these resuilts, we concluded that MTs were ubiquitously present in possible stem cells of various epithelial tissues except melanocytes irrespective of normal or artificial skin and/or mucosa including norrnal hair tissues. In the neoplasms of ectodermal origin, MTs might be involved in the invasive growth of tumor cells in the malignant melanoma and squamous cell carcinoma. It was implied that the role of MTs in basal cell carcinoma might be related to early events of hasal cell carcinogeresis and its down regulating tendency could be possible in its infil trative stage.
Carcinogenesis ; Carcinoma, Basal Cell ; Carcinoma, Squamous Cell ; Copper ; Cytosol ; Dysplastic Nevus Syndrome ; Ectoderm* ; Hair ; Ions ; Keratinocytes ; Melanocytes ; Melanoma ; Metallothionein* ; Molecular Weight ; Mucous Membrane ; Nevus ; Radiation, Ionizing ; Skin ; Skin, Artificial ; Stem Cells ; Zinc

No abstract available.
DNA* ; Herpesvirus 3, Human*

We report a case of MALT lymphoma in a 49-year-old woman. Her disease occurred simultaneously in the mucosa of her right upper eyelid conjunctiva and in her left nostril as ulcerating tumors associated with itchy ichthyosiform skin lesions on the trunk, hyperkeratotic palms and soles, and dystrophic nails. Histopathological examinations revealed consistent findings of MALT lymphoma with dissemination; i.e., diffuse infiltrates of lymphoplasmacytoid cells with a few Russel body-like structures, eosinophils, some shoddy granulomas under the irregularly hyperplastic epidermis, and diffuse infiltrates of CCL ( centrocyte-like ) cells and small lymphocytes inside and outside many lymphoid follicle-like structures in the subcutaneous tissue forming florid lymphoepithelial lesions. She died after 27 months duration of her disease with worsening of ichthyosiform skin lesions and dystrophic nails in spite of total excision of the tumors. We discuss the clinical and histopathologic features of MALT lymphoma with dissemination and the various similar diseases to differentiate.
Conjunctiva ; Eosinophils ; Epidermis ; Eyelids* ; Female ; Glycogen Storage Disease Type VI ; Granuloma ; Humans ; Lymphocytes ; Lymphoma, B-Cell, Marginal Zone* ; Middle Aged ; Mucous Membrane ; Skin ; Subcutaneous Tissue ; Ulcer

No abstract available.
Nevus

No abstract available.
Candida

No abstract available.
Nevus*

No abstract available.
Colon* ; Colonic Neoplasms* ; Humans ; Sparganosis* ; Ultrasonography*

No abstract available.
Hair ; Humans ; Piedra ; Scalp ; Trichosporon

No abstract available.
Onychomycosis