Fetiform teratoma was a parthenogenetic tumor arising from a mature ovum

2017 ◽  
Vol 62 (9) ◽  
pp. 803-808
Author(s):  
Kiyonori Miura ◽  
Takumi Kurabayashi ◽  
Chisei Satoh ◽  
Kensaku Sasaki ◽  
Tatsuya Ishiguro ◽  
...  
Keyword(s):  
Mature Ovum ◽  
Fetiform Teratoma

Memoirs: Observation on the Breeding and Development of the viviparous fish, Heterandria formosa

1940 ◽  
Vol s2-81 (324) ◽  
pp. 479-520
Author(s):  
ELIZABETH A. FRASER ◽  
RACHEL M. RENTON
Keyword(s):  
Early Stage ◽  
Late Development ◽  
Head Region ◽  
Mature Ovum ◽  
Entire Area ◽  
Short Account ◽  
Viviparous Fish ◽  
Large Size ◽  
Noteworthy Feature ◽  
Heterandria Formosa

1. A short account is given of the breeding habits of Heterandria formosa in an aquarium. 2. The ovary and the mature ovum are briefly described, the noteworthy feature of the ripe ovum being the small quantity of yolk. 3. Degeneration of ova is found to be a common occurrence in unfertilized females, and to a less extent in those full of developing embryos. 4. The method for ensuring the fertilization of the egg within the follicle is portrayed. Over the area where the spermatozoa have entered the cells of the ovarian epithelium and those of the follicle form a solid plug which eventually disrupts to enable the fully developed embryo to escape into the cavity of the ovary. 5. It is characteristic of early development that the egg is encircled by a unilaminar ectoderm before there is any visible differentiation into endoderm and mesoderm. 6. Owing to the scarcity of yolk only a few periblast cells arise and no syncytial layer is formed. 7. The primitive-germ cells are visible at an early stage within the apparently undifferentiated mesendoderm cells. 8. A striking feature is the large size of the pericardium and its growth upwards as a pericardium hood which completely surrounds the head region of the embryo. Over the walls runs a network of blood-vessels from which the maternal capillaries become eventually separated by only an attenuated layer of protoplasm. Both respiration and nutrition are effected through the follicle. 9. A remarkable specialization is the development of a urinary bladder which expands into a thin-walled vesicle of enormous dimensions, finally occupying almost the entire area formerly filled by the pericardium and the yolk-granules. 10. The development of Heterandria is compared with that of other viviparous fishes. 11. The significance of the unusual features in early and late development is discussed and some comparisons are made with the conditions in higher vertebrates.

scholarly journals Immature Fetiform Teratoma: An Unexpected Cause of Retroperitoneal Mass

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Rueda Fernando Vázquez ◽  
Rodríguez María Rosa Ibarra ◽  
Pascual Francisco Javier Murcia ◽  
Sánchez Sharmila Devi Ramnarine ◽  
Torres Sandra Rocío Wiesner ◽  
...  
Keyword(s):  
Retroperitoneal Mass ◽  
Fetiform Teratoma

Ovarian Fetiform Teratoma (Homunculus) in a 9-Year-Old Girl

1984 ◽  
Vol 2 (4) ◽  
pp. 392-402 ◽  
Author(s):  
Thomas M. Abbott ◽  
William J. Hermann ◽  
Robert E. Scully
Keyword(s):  
Fetiform Teratoma

The Impact of Traditional Medicine-Based Lifestyle and Diet on Infertility Treatment in Women Undergoing Assisted Reproduction: A Randomized Controlled Trial

2020 ◽  
Vol 27 (4) ◽  
pp. 230-241
Author(s):  
Zeinab Alibeigi ◽  
Effat Jafari-Dehkordi ◽  
Soleiman Kheiri ◽  
Maryam Nemati ◽  
Gholamreza Mohammadi-Farsani ◽  
...  
Keyword(s):  
Traditional Medicine ◽  
Controlled Trial ◽  
Intervention Group ◽  
Infertility Treatment ◽  
Control Group ◽  
Lifestyle Modifications ◽  
Mature Ovum ◽  
The Impact ◽  
Diet And Lifestyle

The problem of infertility is growing rapidly in the world. Traditional medicine with thousands of years of history has claimed that it can treat some kinds of infertility using nutritional and lifestyle modifications and interventions. The purpose of this study was to evaluate the effect of a traditional medicine-oriented diet and lifestyle on infertility treatment. Based on a clinical trial study, 180 infertile women who were 20–40 years old and candidates for in vitro fertilization (IVF) were randomly assigned to 2 groups: an intervention group and a control group. The intervention group used diet and lifestyle recommendations based on Iranian traditional medicine for at least 3 months. The number of ova, mature ovum number, embryo number, embryo quality, and fertilization rate were significantly higher in the intervention group than in the control group (for all items; p < 0.05). Overall pregnancy rate was significantly higher in the intervention group (35.2 vs. 12.4%; odds ratio [OR], 3.8; 95% CI, 1.8–8.3). The intervention group had a higher rate of getting spontaneous pregnancy than the control group (20.9 vs. 2.2%; OR, 11.5; 95% CI, 2.6–50.9). Chemical pregnancy was significantly higher in the intervention group (64 vs. 27.5%; OR, 4.7; 95% CI, 1.9–11.6). Diet and lifestyle modifications based on traditional medicine can contribute greatly to the infertility treatment. Thus, many infertility cases can be treated without the need to use advanced methods. In case of using assisted reproductive techniques, traditional medicine can enhance the efficiency of these methods.

scholarly journals IV.—The Eggs and Larvæ of Teleosteans

1887 ◽  
Vol 33 (1) ◽  
pp. 97-136 ◽  
Author(s):  
J. T. Cunningham
Keyword(s):  
Mature Ovum ◽  
Marine Station ◽  
Eggs And Larvae

The purpose of this memoir is (1) to make known a number of drawings and descriptions of the eggs, embryos, and larvæ of the species of Teleosteans which I have been able to study at the Scottish Marine Station; (2) to review as comprehensively as possible what is known at the present time concerning the structure of the embryos and larvæ of the species of Teleosteans, and to discover what features are common to each family or each order; (3) to discuss the changes which take place in the protoplasm and nucleus of the mature ovum immediately after it is shed, both when fertilised and when unfertilised. The ova of the following species were taken directly from the parent fish, and artificially fertilised. The necessary operations were carried out, in some cases by myself, on board fishing boats—usually steam trawlers from Granton. In many instances I did not myself go out in the boats, but the ova were obtained and brought to me at the laboratory by Alexander Turbyne, keeper of the station. But in every case there is no uncertainty as to the species of the fish from which the ova were taken; if there was any doubt, specimens of the parent fish were brought with the ova.

Pregnancy complicated by foetal abdominal mass: Fetiform teratoma versus foetus-in-fetu

2017 ◽  
Vol 37 (6) ◽  
pp. 815-817
Author(s):  
Laura K. Newcomb ◽  
Eleanor H. J. Rhee ◽  
Sarah M. Bean ◽  
Jina Kim ◽  
Elisabeth T. Tracy ◽  
...  
Keyword(s):  
Abdominal Mass ◽  
Fetiform Teratoma

scholarly journals Vaginal presentation of a fetiform teratoma

2021 ◽  
Vol 26 ◽  
pp. 300555
Author(s):  
Linda Hong ◽  
Laura Denham ◽  
Yevgeniya Ioffe
Keyword(s):  
Fetiform Teratoma

scholarly journals A Rare Form of Dermoid Cyst: A Fetiform Teratoma

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
SG Erciyestepe ◽  
H Turan ◽  
I Kahramanoglu
Keyword(s):  
Dermoid Cyst ◽  
Rare Form ◽  
Fetiform Teratoma

scholarly journals Lumbar fetiform teratoma; a case report

2020 ◽  
Vol 15 (7) ◽  
pp. 837-840
Author(s):  
Fazel Rahman Faizi ◽  
Najibullah Rasouly
Keyword(s):  
Case Report ◽  
Fetiform Teratoma

scholarly journals The Origin and Fate of Annulate Lamellae in Maturing Sand Dollar Eggs

1959 ◽  
Vol 5 (1) ◽  
pp. 117-121 ◽  
Author(s):  
R. W. Merriam
Keyword(s):  
Nuclear Envelope ◽  
Annulate Lamellae ◽  
Dense Matrix ◽  
Sand Dollar ◽  
Variable Size ◽  
Mature Ovum ◽  
Physical Relationship ◽  
Cytoplasmic Vesicles ◽  
Dendraster Excentricus ◽  
Cytoplasmic Side

Electron micrograph evidence is presented that the nuclear envelope of the mature ovum of Dendraster excentricus is implicated in a proliferation of what appear as nuclear envelope replicas in the cytoplasm. The proliferation is associated with intranuclear vesicles which apparently coalesce to form comparatively simple replicas of the nuclear envelope closely applied to the inside of the nuclear envelope. The envelope itself may become disorganized at the time when fully formed annulate lamellae appear on the cytoplasmic side and parallel with it. The concept of interconvertibility of general cytoplasmic vesicles with most of the membrane systems of the cytoplasm is presented. The structure of the annuli in the annulate lamellae is shown to include small spheres or vesicles of variable size embedded in a dense matrix. Dense particles which are about 150 A in diameter are often found closely associated with annulate lamellae in the cytoplasm. Similar structures in other echinoderm eggs are basophilic. In this species, unlike other published examples, the association apparently takes place in the cytoplasm only after the lamellae have separated from the nucleus. If 150 A particles are synthesized by annulate lamellae, as their close physical relationship suggests, then in this species at least the necessary synthetic mechanisms and specificity must reside in the structure of annulate lamellae.

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