نتایج جستجو برای: yolk sac tumor
تعداد نتایج: 446376 فیلتر نتایج به سال:
Although the guinea pig is an important animal model for human placentation, aspects of fetal nutrition are not fully understood, especially in regard to the yolk sac that is regarded to be essential for early development of the embryo. We investigated differentiation by means of histology, histochemistry, immunohistochemistry, and transmission electron microscopy. Data suggest that the guinea ...
BACKGROUND Nonseminomatous germ cell tumor of the testis (NSGCT) is largely curable. However, a small group of patients develop refractory disease. We investigated the hypothesis that intratumoral heterogeneity contributes to the emergence of chemoresistance and the development of refractory tumor subtypes. RESULTS Our institution's records for January 2000 through December 2010 included 275 ...
In this report we present a case ofprimary yolk sac tumour of the anterior mediastinum in which two dimensional echocardiography showed an extracardiac mass simulating a large pericardial effusion. Mediastinal yolk sac tumour is a rare germ cell neoplasm affecting mainly young men.' The most common presenting symptoms are dyspnoea, cough, and chest pain.2 The prognosis is usually poor, though i...
The sex-linked gene for imperfect albinism (S*ALS) has been associated with slow early growth in some trials but not in others. Albino (59) and nonalbino (73) chicks were raised to 3 d of age to study early growth. At 3 d of age, plasma beta-hydroxybutyrate (beta-HBA) levels were measured and the chicks were euthanatized and dissected to measure liver, gall bladder, and yolk sac weights. Fatty ...
The role of the visceral yolk sac in mediating protein utilization by rat embryos cultured in vitro.
Conceptuses from 9-5-day pregnant rats have been cultured for 48 h in heat-inactivated homologous serum. Embryonic development was normal. The protein contents of embryos and visceral yolk sacs after different periods of culture were recorded. When I-labelled polyvinylpyrrolidone or [H]dextran were added to the culture serum, radioactivity was accumulated by the yolk sac, but only background le...
About five years ago a technic was described by means of which rat and mouse tumors could be grown in the yolk sacs of embryonated eggs (5, 7). At that time, it was pointed out that by this method relatively large masses of pure cultures of rat and mouse tumor tissue were readily obtainable. Other laboratories have used the technic successfully (1, 2, 8). Since the publication of the initial re...
Yolk sac tumor (YST) is one of the rare malignant germ cell tumor and usually occurs in gonad. Extragondal sites of YSTs are reported in mediastinum, vagina, brain, and retroperitoneum but are extremely rarely in omentum. The clinicopathologic feature of primary omental YST is not well known and there are only 5 cases reported currently. Recently we experienced a primary YST of omentum in 27-ye...
211 Received January 31, 2013; revised and accepted July 11, 2013. Published online August 3, 2013; doi: 10.1620/tjem.230.211. Correspondence: Takanobu Kojimahara, Department of Obstetrics and Gynecology, Yamagata University School of Medicine, 2-2-2 Iidanishi, Yamagata, Yamagata 990-9585, Japan. e-mail: [email protected] A part of the data was presented by K.N. at the poster ses...
Reproductive technologies are widely used in cattle, although many are associated with high-embryonic mortality, especially during early gestation, when the yolk sac undergoes macroscopic changes in structure. We hypothesized that vasculogenesis and angiogenesis are affected, thereby affecting embryonic and placental differentiation. To test this, we studied yolk sac development and gene expres...
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