Words similar to extra-embryonal
Example sentences for: extra-embryonal
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NSGCTs display complex differentiation patterns that include embryonal, extra-embryonal, and somatic tissue types [ 6 ] . Teratomas with somatic differentiation can undergo additional malignant transformation with characteristics of epithelial, mesenchymal, neurogenic, or hematologic tumors [ 7 ] . While the majority of GCTs exhibit exquisite sensitivity to cisplatin-based chemotherapy, a small proportion of metastatic tumors remain resistant.
Germ cell tumors (GCTs) are the most common cancer in men between the ages 20-40 with an incidence of 4.2 cases per 100,000 [ 5 ] . GCTs arise by transformation of spermatogonial lineage cells and display pluripotentiality for embryonal and extra-embryonal lineage differentiation [ 6 ] . Histologically, they may present as undifferentiated germ cell (GC)-like seminomas (SGCTs) or highly differentiated nonseminomas (NSGCTs).
A unique feature of GCTs is their origin from germ cells at a stage in development where they undergo epigenetic reprogramming [ 6 13 ] . The absence of this epigenetic modification in SGCTs is consistent with their GC-like nature as previously noted [ 6 14 ] . On the other hand, the extensive promoter hypermethylation seen in NSGCTs suggests a mechanistic role in their potential for embryonal and extra-embryonal lineage differentiation [ 6 14 ] . Establishment of DNA methylation in the mammalian genome is controlled by at least three DNA methyltransferases (DNMTs), DNMT1 , DNMT3a and DNMT3b [ 15 ] . The role of these DNMTs in differential de novo methylation in SGCT vs.
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