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  • 1
    ISSN: 1442-2042
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Background:  We evaluated the outcome of radical prostatectomy to provide information about long-term survival following this procedure.Methods:  One hundred and twenty-three otherwise healthy Japanese patients with clinically localized tumors underwent radical prostatectomy. Treatment outcomes were measured in terms of clinical progression-free survival, prostate cancer-specific survival and overall survival. Overall survival was compared with expected survival of age-matched Japanese men.Results:  For these 123 patients, clinical progression-free survival and prostate cancer-specific survival at 10 years were 72.5% and 86.4%, respectively. Results of Cox multivariate analysis showed that only pathological stage (P = 0.047) and tumor grade (P = 0.009) were independent predictors of clinical progression. Only tumor grade was a statistically significant independent predictor (P = 0.048) in terms of prostate cancer death. Both the 10 and 15-year overall survival rates for these 123 patients were 58.6%, whereas the expected survival of age-matched Japanese men was 65.0% at the 10-year follow up, and 43.8% at the 15-year follow up.Conclusions:  The long-term overall survival in this surgically treated group is comparable to the expected survival rate of age-matched Japanese men. These results might be useful in counselling patients with clinically localized prostate cancer.
    Materialart: Digitale Medien
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  • 2
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Science Pty
    International journal of urology 9 (2002), S. 0 
    ISSN: 1442-2042
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Background: No significant differences in gross and light- microscopic features have been reported between preclinical and overt Cushing’s adenomas. In this study, the ultrastructural differences between the two syndromes was attempted to be clarified. Methods: Two preclinical Cushing’s syndrome adenomas and two overt Cushing’s syndrome adenomas obtained from surgical extirpation were examined in an electron microscopic study. Results: Light microscopically, the adenomas of both syndromes were composed predominantly of clear cells, with few compact cells. Ultrastructurally, the prominent differences were of development in each organelle: the preclinical Cushing’s adenomas had undeveloped mitochondria, which were smaller in size and had sparse cristae, lysosomes and polysomes, whereas the overt Cushing’s adenomas contained well-developed mitochondria which were larger in size and were filled with abundant cristae, smooth endoplasmic reticulum (SER), lysosomes and polysomes. Conclusions: Preclinical Cushing’s syndrome adenomas were ultrastructurally characterized by a reduced number of cellular organelles such as mitochondria and SER, which are necessary to synthesize glucocorticoid hormones. However, examination of a greater number of adenomas will be required to be able to draw conclusions on the ultrastructural differences between the two syndromes.
    Materialart: Digitale Medien
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  • 3
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    International journal of urology 4 (1997), S. 0 
    ISSN: 1442-2042
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Background We conducted ultrastructural studies to clarify the fine structure of penile plaques and adjacent corpora cavernosa, and the causative basis for the process, in Peyronie's disease. Methods Penile plaques and adjacent corpora cavernosa were obtained during surgical extirpation from 5 patients with Peyronie's disease. Control tissues from the tunica albuginea and adjacent corpora cavernosa were obtained at penile amputation from 2 patients with penile cancer. Prepared tissues were examined by using electron microscopy. Results Penile plaques were composed of collagen fibrils, amorphous particulate material, and fibroblasts in all patients. In 1 of 5 patients, myofibroblasts were found in the border area between the lesion and underlying structures. Smooth-muscle cells and endothelial cells resembling myofibroblasts were noted in adjacent corpora cavernosa. In this patient, the plaque progressively enlarged, and was removed within 1 year of onset of the induration. Conclusions Fibromatosis in Peyronie's disease involves both fibroblasts and myofibroblasts, which undergo sclerosis in some phase. In addition, smooth-muscle cells and endothelial cells in the adjacent corpora cavernosa may be incorporated in the fibromatosis.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    ISSN: 1860-1499
    Schlagwort(e): Nonfunctioning adrenocortical adenoma ; Ultrastructural study ; Electron microscopy ; Nonfunctioning adrenocortical black adenoma
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Nonfunctioning adrenocortical adenomas obtained from 40 and 60-year-old males were examined by electron microscopy. Light microscopically, the tumors were shown to consist of clear cells and compact cells in both cases. However, compact cells predominated in the former case, and clear cells in the latter. Electron microscopy revealed that most of the cells in the former case had abundant organelles, including well-developed, smooth and rough endoplasmic reticulum, Golgi apparatus, and mitochondria with elaborate tubulovesicular cristae. The findings resembled those of adenomas with Cushing's syndrome. The latter case revealed a majority of cells with numerous, large lipid vacuoles, moderate amounts of smooth endoplasmic reticulum, Golgi apparatus, and mitochondria with sparse lamellar cristae resembling features of aldosteronoma. These ultrastructural findings suggest that even nonfunctioning adrenocortical adenomas, like functioning adrenocortical adenomas, have some possibility of producing adrenal hormones.
    Materialart: Digitale Medien
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  • 5
    ISSN: 1860-1499
    Schlagwort(e): Adrenal medulla ; Ganglioneuroma ; Electron microscopy ; Ultrastructural study
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Tissue samples of adrenal ganglioneuromas were obtained from two patients: 35- and 47-year-old males. Light microscopic studies showed that these tumors contained Schwann cells and ganglion cells. Electron microscopic examinations revealed numerous unmyelinated and myelinated axons surrounded by Schwann cells. The ganglion cells in the tumors had abundant organelles, such as well-developed cisternae of the rough endoplasmic reticulum, many profiles of the Golgi apparatus, mitochondria, lysosomes, microtubules and neurofilaments. Electron dense cored granules resembling catecholamine granules were present in the ganglion cell bodies and neural processes. These features resmebled those of normal sympathetic ganglion cells. It is concluded that adrenal ganglioneuroma originates from sympathetic ganglion tissue.
    Materialart: Digitale Medien
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