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endodermal sinus tumor/phosphatase
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Pagina 1 a partire dal 45 risultati
A primary pure yolk sac tumor of the lung exhibiting CDX-2 immunoreactivity and increased serum levels of alkaline phosphatase intestinal isoenzyme.
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Malignant extragonadal germ cell tumors primary to the lung are quite uncommon lesions, but pure yolk sac tumor is even more exceptional. This is believed to be the first reported case of yolk sac tumor of the lung in which an intense and diffuse immunoreactivity for CDX2, a marker of intestinal
Diagnostic utility of SALL4 in extragonadal yolk sac tumors: an immunohistochemical study of 59 cases with comparison to placental-like alkaline phosphatase, alpha-fetoprotein, and glypican-3.
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Extragonadal yolk sac tumors (YSTs; primary and metastatic) are rare but are malignant germ cell tumors. Pathologic diagnosis of extragonadal YSTs can be challenging without immunohistochemical markers but markers used for diagnosing these tumors such as placental-like alkaline phosphatase (PLAP),
Intratubular germ cell neoplasia in infantile yolk sac tumor. Verification by tandem repeat sequence in situ hybridization.
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The strong association of intratubular germ cell neoplasia (ITGCN) with adult germ cell testicular tumors is well known, but studies noting the absence of ITGCN in certain germ cell neoplasms such as spermatocytic seminoma, childhood teratoma, and infantile yolk sac tumor (YST) have raised the issue
Placental alkaline phosphatase immunohistochemistry of intratubular malignant germ cells and associated testicular germ cell tumors.
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Two hundred three testicular germ cell tumors were studied immunohistochemically for the presence of placental alkaline phosphatase (PLAP). Special emphasis was placed on the pattern and incidence of positive staining of intratubular malignant germ cells (ITMGCs) adjacent to tumors. 99% of cases
Primary yolk sac tumor of the omentum: a case report and literature review.
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BACKGROUND
Yolk sac tumor (YST) is the second most common malignant ovarian germ cell tumor, while a YST arising in the omentum is an exceedingly rare malignancy.
METHODS
A 44-year-old woman was admitted with a history of abdominal distension of a month's duration. The alpha-fetoprotein (AFP) serum
Ovarian mixed germ cell tumor composed of dysgerminoma, endodermal sinus tumor, choriocarcinoma and mature teratoma in a 44-year-old woman: case report and literature review.
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A case of ovarian mixed germ cell tumor in a 44-year-old woman was examined. The tumor was well circumscribed, measured 15 x 11 x 10 cm and appeared solid and partly cystic on the cut surface. Light microscopic examinations revealed that the tumor was composed of four different neoplastic germ cell
Yolk sac tumor in the fourth ventricle: a case report.
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The nongerminomatous germ cell tumor occurring in the fourth ventricle is extremely rare. A 9-year-old boy presented with symptoms of obvious headache, projectile vomiting, diplopia and motor weakness. MRI scanning revealed lesions occupying the fourth ventricle, with dual-lateral ventricle
Primary Mediastinal Yolk Sac Tumors: An Immunohistochemical Analysis of 14 Cases.
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Primary mediastinal germ cell tumors are uncommon tumors that can pose diagnostic difficulties due to their morphologic spectrum and unusual site. Immunohistochemistry plays an increasing role in the diagnosis of these tumors. Whereas the immunophenotype of testicular yolk sac tumors (YST) is rather
Germ cell neoplasms of head and neck soft tissues: a pathologic spectrum of teratomatous and endodermal sinus tumors.
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Germ-cell neoplasms, in particular teratomas with immature and mature somatic type tissues, are some of the most commonly found tumors in children. Approximately 5% of these neoplasms appear in one of several extracranial sites in the head and neck region. This study reports the clinical, pathologic
Ovarian endodermal sinus tumor with intestinal differentiation.
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A 12-year-old girl was admitted to the hospital for evaluation of an abdominal mass. A preoperative computed tomography scan showed a large tumor in the pelvis. The serum alpha-fetoprotein level was 2,170,000 ng/ml. A 3000-g left ovarian neoplasm was resected. It was encapsulated and showed focal
Yolk sac tumor of the liver combined with hepatocellular carcinoma.
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Hepatic yolk sac tumor is extremely rare, and only nine cases have been reported previously to our knowledge. We report the occurrence of a tumor combining hepatocellular carcinoma and yolk sac tumor. The clinical, pathologic, and immunohistochemical findings are presented. The patient was a
Evidence for the transformation of seminoma to yolk sac tumor, with histogenetic considerations.
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Recent ultrastructural, cytogenetic, and ploidy analyses indicate that seminoma acts as a precursor from which other forms of testicular germ cell tumor may originate. Ten cases of primary or metastatic testicular germ cell tumors were investigated that showed possible transformation of seminoma to
Immature teratoma producing alpha-fetoprotein without components of yolk sac tumor in the pineal region.
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A case of pineal region tumor in a 9-year-old boy with a high serum alpha fetoprotein (AFP) level is reported. The serum levels of beta-human chorionic gonadotropin (HCG) and placental alkaline phosphatase (PLAP) were not elevated. The tumor was composed of radiologically different components and
Yolk sac tumor of the stomach with an adenocarcinomatous component: a case report with immunohistochemical analysis.
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A 56-year-old male treated for a gastric yolk sac tumor with an adenocarcinomatous component is described. A mixed area of reticular and glandular neoplastic components was morphologically identified in this tumor. Immunohistochemically, the yolk sac tumor expressed alpha-fetoprotein (AFP),
Microcystic Leydig cell tumors mimicking yolk sac tumor: a report of four cases.
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We report four cases of Leydig cell tumor of the testis with a microcystic pattern that mimicked yolk sac tumor. The patients ranged in age from 27 to 35 years and, except for one tumor that was discovered incidentally, presented with testicular masses. All tumors were intratesticular, and three
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