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Seite 1 von 20 Ergebnisse
[Tyrosine metabolism, antioxidative system and free radical lipid oxidative processes in children with pigmented nevus and melanoma].
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The plasma levels of tyrosine and the lipid peroxidation intermediate malonic dialdehyde (MDA) were measured in children with pigmental nevus and melanoma. They were found to have antioxidative protective failure. The presence of pigmental nevus predetermines the high incidence of tyrosine metabolic
FT-Raman spectroscopy for the differentiation between cutaneous melanoma and pigmented nevus.
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Cutaneous melanoma is the most aggressive type of skin cancer and Ft-Raman spectroscopy has been studied as a potential method that could be a real alternative for early diagnosis of neoplasms.
OBJECTIVE
To qualify the spectral FT-Raman data, in order to differentiate cutaneous melanoma and
Adnexal-centered giant congenital melanocyte nevus with extensive ganglioneuromatous component and trisomy 7.
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Adequate interpretation of clinical and histopathologic features of giant congenital melanocytic nevus (GCMN) in newborns is a continued challenge. A GCMN with three large nodules and three polypoid exophytic tumors presented in the dorsum of a female full-term newborn, the borders exhibiting a
Characterization of melanosomes and melanogenesis in cells cultured from Ota's nevus.
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Cells from dermis and epidermis of Ota's nevus lesions were cultured to obtain the pigment producing cells that are specific epidermal and dermal melanocytes of nevus Ota. The following media were used: Eagle's minimum essential medium, fortified or not fortified with cholera toxin and phorbol
Sporadic dysplastic nevus syndrome in a tyrosinase-positive oculocutaneous albino.
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A case of dysplastic nevus syndrome in a 41-year-old tyrosinase-positive oculocutaneous albino man is presented. Clinically the patient exhibited multiple amelanotic lesions; histologic examination provided the diagnosis of dysplastic nevus syndrome. Fontana-Masson silver staining revealed the
Nevus comedonicus: an updated review.
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The intention of this review on nevus comedonicus (NC) is to update on clinical features, pathogenesis, and therapy. NC is a rare epidermal nevus type. It is part of the nevus comedonicus syndrome, a neurocutaneous disorder with ocular, skeletal, and central nervous symptoms. Recently, acne-related
Rosette formation within a proliferative nodule of an atypical combined melanocytic nevus in an adult.
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Rosette formation is a feature that has not been described as occurring in melanocytic neoplasms. We present such a unique case. A 59-year-old man presented with an asymptomatic, soft, hairy 3.0 x 2.0-cm pigmented lesion that had been present for many years in the right external ear, extending from
Elevated expression of c-kit in small venous malformations of blue rubber bleb nevus syndrome.
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The blue rubber bleb nevus syndrome (BRBNS, syn. bean syndrome) is a rare disease characterized by multiple cutaneous and gastrointestinal venous malformations associated with severe bleeding. However, the underlying molecular mechanisms are unknown and no targeted therapeutic approach exists to
Increased melanogenesis is a risk factor for oxidative DNA damage--study on cultured melanocytes and atypical nevus cells.
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Melanin synthesis is an oxygen-dependent process that acts as a potential source of reactive oxygen species (ROS) inside pigment-forming cells. The synthesis of the lighter variant of melanin, pheomelanin, consumes cysteine and this may limit the capacity of the cellular antioxidative defense. We
Plexiform Myofibroblastoma: Clinicopathologic Analysis of 36 Cases of a Distinctive Benign Tumor of Soft Tissue Affecting Mainly Children and Young Adults
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The spectrum of benign superficial fibroblastic/myofibroblastic tumors continues to expand and includes entities such as plexiform fibrohistiocytic tumor, dermatomyofibroma and fibroblastic connective tissue nevus. Here, we describe a seemingly distinctive group of lesions which we have labeled
Anti-acne agents attenuate FGFR2 signal transduction in acne.
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Increased fibroblast growth factor receptor-2 (FGFR2) signaling has been proposed to be involved in acne pathogenesis and explains acne lesions in Apert syndrome and unilateral acneiform nevus associated with gain-of-function point mutations of FGFR2. If, indeed, increased FGFR2 signaling plays a
[Therapeutic possibilities of hereditary diseases in dermatology].
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Several years ago the therapeutic possibilities for the treatment of inherited skin disorders were rather restricted; recently new possibilities have been developed and successfully applied. The author discusses the indications for a surgical procedure in basal cell nevus syndrome and the satisfying
A case of Beare-Stevenson cutis gyrata syndrome confirmed by mutation analysis of the fibroblast growth factor receptor 2 gene.
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This paper reports a case of Beare-Stevenson cutis gyrata syndrome confirmed by DNA analysis of the patient's fibroblast growth factor receptor (FGFR) genes. At birth, the patient had ocular proptosis, a red nevus with skin tags on her forehead and an umbilical stump. She developed craniosynostosis,
Development of Molecular Therapies for Venous Malformations.
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Vascular anomalies are localized defects of morphogenesis that can affect lymphatic and blood vessels. They are generally called birthmarks, typically observed soon after birth and occurring in up to 10% of children. Based on their clinical and histological characteristics, they are classified into
Mosaic Activating Mutations in FGFR1 Cause Encephalocraniocutaneous Lipomatosis.
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Encephalocraniocutaneous lipomatosis (ECCL) is a sporadic condition characterized by ocular, cutaneous, and central nervous system anomalies. Key clinical features include a well-demarcated hairless fatty nevus on the scalp, benign ocular tumors, and central nervous system lipomas. Seizures,
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