Imaging in gynecological disease (17): ultrasound features of malignant ovarian yolk sac tumors (endodermal sinus tumors)
نویسندگان
چکیده
منابع مشابه
Radiology of primary intracranial yolk-sac (endodermal sinus) tumors.
Most primary intracranial germ-cell tumors are germinomas and teratomas. Less frequent are embryonal carcinomas, choriocarcinomas, and yolk-sac (endodermal sinus) tumors in various admixtures and degrees of purity. Teilum [1] first used the term endodermal sinus tumor in 1959 to describe those tumors (whether ovarian, testicular, or extragonadal) that originate in primitive germ cells of extrae...
متن کاملImaging Features of Malignant Lacrimal Sac and Nasolacrimal Duct Tumors.
The purpose of this study was to present the imaging features of primary and secondary malignant lacrimal sac and nasolacrimal duct tumors and their pattern of tumor spread in 18 patients. The most common tumor histology in our series was squamous cell carcinoma. In 15/18 patients, tumor involved both the lacrimal sac and duct at the time of diagnosis. In 11/16 patients on CT, the nasolacrimal ...
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Some months ago there was published from this laboratory a brief preliminary report of a method whereby tumors could be cultivated in the yolk sacs of developing chick embryos (4). Neoplasms were first injected into the yolk sac with the idea that the tumor cells would die and disintegrate, thus releasing any virus that might be present. It was hoped that if such a release occurred the medium p...
متن کاملEndodermal origin of yolk-sac-derived teratomas.
Mutant mice deficient in glucose-6-phosphate dehydrogenase were used to induce teratomas. This enzyme is linked to the X chromosome, which can be inactivated in female embryo. The differences in the enzyme activity between yolk sac mesoderm and embryo versus yolk sac endoderm can be detected in female concepti by using appropriate crosses of wild-type and G6PD-deficient mice. Histochemical stud...
متن کاملPATTERN OF MALIGNANT TUMORS IN KERMAN PROVINCE
From March 1980 to March 1989 a total number of 2254 (7.6%) new malignant cases from Kerman province were diagnosed by examination of surgical specimens, blood films and bone marrow smears. The crude relative frequency of cancers was studied and compared with other areas of Iran. Gastric (11.36%) and urinary bladder (7.01 %) carcinomas were significantly more common in Kerman province than...
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ژورنال
عنوان ژورنال: Ultrasound in Obstetrics & Gynecology
سال: 2020
ISSN: 0960-7692,1469-0705
DOI: 10.1002/uog.22002