Ad
related to: ovarian yolk sac tumor histology ultrasound
Search results
Results From The WOW.Com Content Network
A micrograph showing yolk sac tumour, with smooth external surface and capsule tears [citation needed] The ovarian yolk sac tumors, also known as endodermal sinus tumors, are accountable for approximately 15.5% of all OGCTs. [8] They have been observed in women particularly in their early ages, and rarely after 40 years of age. [9]
Histologically, yolk sac tumors are characterized by the presence of Schiller-Duval bodies (which are pathognomonic for yolk sac tumors) and a reticular pattern. Yolk sac tumors commonly secrete alpha-fetoprotein and can be immunohistochemically stained for its presence; the level of alpha-fetoprotein in the blood is a useful marker of ...
It is the most common testicular tumor in children under three, [2] and is also known as infantile embryonal carcinoma. This age group has a very good prognosis. In contrast to the pure form typical of infants, adult endodermal sinus tumors are often found in combination with other kinds of germ cell tumor, particularly teratoma and embryonal ...
Of special concern is the secretion of alpha-fetoprotein (AFP); under some circumstances, AFP can be used as a diagnostic marker specific for the presence of yolk sac cells within the teratoma. These cells can develop into a frankly malignant tumor known as yolk sac tumor or endodermal sinus tumor.
An important key to distinguish it from other tumors, such as seminoma (vacuolated), teratocarcinoma (three differentiated germ layers), yolk sac tumor (Schiller–Duval bodies), and the Sertoli–Leydig cell tumor (strings of glands), is that the embryonal carcinoma cells are "trying" to evolve into their next stage of development.
A teratoma is a tumor of germ cell origin, containing tissues from more than one germ cell line, [2] [3] [4] It can be ovarian or testicular in its origin. [ 4 ] and are almost always benign. [ 5 ] An immature teratoma is thus a very rare tumor, representing 1% of all teratomas , 1% of all ovarian cancers , and 35.6% of malignant ovarian germ ...
Micrograph showing the yolk sac component of a mixed germ cell tumour. H&E stain. Micrograph of an H&E stained section of a peripheral PNET. Blue nevus Micrograph of a small-cell carcinoma showing cells with nuclear moulding, minimal amount of cytoplasm and stippled chromatin.
A dysgerminoma is a type of germ cell tumor; [1] it usually is malignant and usually occurs in the ovary.. A tumor of the identical histology but not occurring in the ovary may be described by an alternate name: seminoma in the testis [2] or germinoma in the central nervous system or other parts of the body.