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cryptorchidism/phosphatase
Веза се чува у привремену меморију
Страна 1 од 42 резултати
Positive Oct -3/4 and D2-40 Immunohistochemical Expression in Germ Cells and Suspected Histology Pattern of Intratubular Germ Cell Neoplasia in Boys with Cryptorchidism Vanish after the Age of 2 Years.
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Introduction Intratubular germ cell neoplasia (ITGCN) is a precursor to testicular germ cell cancer. Adult germ cell cancer immunohistochemical markers may fail to detect ITGCN in prepubertal boys with congenital cryptorchidism, because positive immunohistochemistry is commonly seen in boys younger
The value of positive Oct3/4 and D2-40 immunohistochemical expression in prediction of germ cell neoplasia in prepubertal boys with cryptorchidism.
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OBJECTIVE
Intratubular germ cell neoplasia (ITGCN) is a precursor to testicular germ cell cancer. Adult germ cell cancer immunohistochemical markers fail to detect ITGCN in prepubertal boys with congenital cryptorchidism, because positive immunohistochemistry is commonly seen below 18 months old,
Features of impaired seminiferous tubule differentiation are associated with germ cell neoplasia in adult men surgically treated in childhood because of cryptorchidism.
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Seminiferous tubule differentiation was related to the occurrence of germ cell neoplasia in 38 men, aged 17-47, treated surgically in childhood for cryptorchidism. Tissues from 46 testes obtained from biopsies taken as a neoplastic preventive procedure or whole testes removed because of GCT were
Impaired serum inhibin-B and number of germ cells in boys with cryptorchidism following heavily gestational maternal smoking.
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OBJECTIVE
A meta-analysis including 11,900 cases showed that maternal gestational smoking was associated with increased risk of cryptorchidism. The aim of study was to investigate whether a hormone profile of cryptorchid boys and a supplementing histopathological evaluation of testicular biopsies
Analysis of POU5F1, c-Kit, PLAP, AP2γ and SALL4 in gonocytes of patients with cryptorchidism.
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Cryptorchidism is a risk factor for the development of testicular germ cell tumors (TGCTs). The most common type of TGCT in cryptorchidism is seminoma. The intratubular germ cell neoplasia unclassified (ITGCNU) is a histological pattern preceding the development of seminomas and non-seminomas. It
Risk of germ cell malignancy in children with XY intersex versus isolated cryptorchidism by immunohistochemistry.
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The risk of subsequent development of testicular germ cell neoplasia is related to presence of underlying developmental defects such as cryptorchidism, in which the risk is around 0.5%, and XY intersex with abdominal testes, in which the risk may be as high as 20-25%. We examined the hypothesis that
Gonocyte transformation in congenital undescended testes: what is the role of inhibin-B in cell death?
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The effect of cryptorchidism on the quantitative histology, histochemistry and hydrolytic enzyme activity of the rat testis.
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Cryptorchidism of the mature rat testis led to degeneration of the seminiferous tubules and changes in enzyme patterns and activities. Spermatogenic stages 1-4, containing pachytene primary spermatocytes in late meiotic prophase, and stage 5, containing recently formed round spermatids, were damaged
Adult immunohistochemical markers fail to detect intratubular germ cell neoplasia in prepubertal boys with cryptorchidism.
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OBJECTIVE
Intratubular germ cell neoplasia is a precursor to testicular germ cell cancer. The condition is characterized by large germ cells with large nuclei with a hyperchromatic, coarse chromatin pattern, large prominent nucleoli and abundant pale cytoplasm. In prepubertal boys these cells are
Placental alkaline phosphatase immunoreactivity in testicular germ-cell neoplasms.
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We analyzed the sensitivity of a polyclonal antibody to placental alkaline phosphatase (PLAP) in labelling testicular germ-cell neoplasms, by utilizing the peroxidase-antiperoxidase technique. The immunoreactivity of 89 germ-cell tumors for PLAP was as follows: 98% of cases with seminomatous
Identification of testicular atypical germ cells by an immunohistochemical technique for placental alkaline phosphatase.
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The identification of atypical testicular germ cells is often difficult by by routine histologic examination. By immunohistochemical detection of placental alkaline phosphatase (PLAP) and by periodic acid Schiff staining of glycogen, atypical germ cells were easily identified in testicular samples.
Mutations in PTPN11, encoding the protein tyrosine phosphatase SHP-2, cause Noonan syndrome.
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Noonan syndrome (MIM 163950) is an autosomal dominant disorder characterized by dysmorphic facial features, proportionate short stature and heart disease (most commonly pulmonic stenosis and hypertrophic cardiomyopathy). Webbed neck, chest deformity, cryptorchidism, mental retardation and bleeding
Prevalence of intratubular germ cell neoplasia in cryptorchid testes of infertile men.
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BACKGROUND
Cryptorchidism is a common malformation in neonates; surgery or medical treatments are applied during childhood. Untreated cryptorchid testes are in the risk of intratubular germ cell neoplasia (IGCN) and consequently invasive testicular tumors which could be shown by immunohistochemistry
Early orchiopexy: prepubertal intratubular germ cell neoplasia and fertility outcome.
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OBJECTIVE
To investigate the prepubertal prevalence of intratubular germ cell neoplasia of the unclassified type (ITGCNU) and its significance as a predictor of testicular cancer and to evaluate the effect of early orchiopexy (at younger than 2 years of age) on subsequent fertility of patients with
Less advanced testicular dysgenesis is associated by a higher prevalence of germ cell neoplasia.
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There is a theory that the more evident clinical signs of testicular dysgenesis, the more frequent the neoplastic lesions are. The aim of this study was to relate the incidence of testicular germ cell neoplastic lesions (overt germ cell tumours--GCT or testicular carcinoma in situ) to the intensity
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