Dating the earth ppt

Dating the earth ppt

There are two predominant isoforms of COX enzymes, COX-1, which is constitutively expressed in many cell types and COX-2, which is induced by factors including cytokines and tumour promoters Kniss PGI 2 elicits its effects on target cells by interaction with its G protein-coupled receptor IP receptor , which has a typical seven-trans-membrane structure Narumiya et al. Maximal expression and signalling of these receptors are detected during the mid-late proliferative phase of the menstrual cycle. In contrast, little is known of the expression pattern and function of the IP receptor in human endometrium, although PGIS and IP receptor expression have been demonstrated in pregnant and non-pregnant myometrium Moonen et al. Moreover, PGI 2 is known to act as a smooth muscle relaxant Wilhelmsson et al. The effects of PGI 2 on platelet aggregation and vascular tone have outlined its potential role in menstruation Baird et al.

Breast cancer

Products of conception , abbreviated POC , is a medical term used for the tissue derived from the union of an egg and a sperm. It encompasses anembryonic gestation blighted ovum which does not have a viable embryo. In the context of tissue from a dilation and curettage , the presence of POC essentially excludes an ectopic pregnancy. Retained products of conception is where products of conception remain in the uterus after childbirth , medical abortion or miscarriage also known as spontaneous abortion.

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Colleague’s E-mail is Invalid. Your message has been successfully sent to your colleague. Save my selection. Academy Ave. The work cannot be changed in any way or used commercially without permission from the journal. Human trophoblast cell-surface marker TROP-2 has been reported to be overexpressed in various human carcinomas CAs and suggested to be a prognostic marker for some CAs.

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In an era of ever-increasing knowledge of the symphony of physiologic events surrounding ovulation, fertilization, and implantation of human oocytes and embryos, born out of previously unimaginable technologic advancement, few scientific puzzles have been explored more times than the entity synonymously known as luteal phase insufficiency, inadequacy, defect, or deficiency.

This chapter uses the term luteal phase deficiency LPD. Although it successfully can be argued that LPD is the most common abnormality of the menstrual cycle, its significance as a disease entity is shrouded in controversy over its incidence, means of diagnosis, and legitimacy of treatment. Since the first formal description of LPD in as a possible cause of infertility and recurrent miscarriage by Jones, 1 innumerable investigations have been undertaken in an effort to verify its existence or to characterize its pathophysiology, diagnosis, and treatment.

Surgical Pathology Criteria is focused on the presentation of useful diagnostic, grading and staging criteria in an accessible format. The site is designed for use​.

A major proportion of the workload in many histopathology laboratories is accounted for by endometrial biopsies, either curettage specimens or outpatient biopsy specimens. The increasing use of pipelle and other methods of biopsy not necessitating general anaesthesia has resulted in greater numbers of specimens with scant tissue, resulting in problems in assessing adequacy and in interpreting artefactual changes, some of which appear more common with outpatient biopsies.

In this review, the criteria for adequacy and common artefacts in endometrial biopsies, as well as the interpretation of endometrial biopsies in general, are discussed, concentrating on areas that cause problems for pathologists. An adequate clinical history, including knowledge of the age, menstrual history and menopausal status, and information on the use of exogenous hormones and tamoxifen, is necessary for the pathologist to critically evaluate endometrial biopsies.

Topics such as endometritis, endometrial polyps, changes that are induced by hormones and tamoxifen within the endometrium, endometrial metaplasias and hyperplasias, atypical polypoid adenomyoma, adenofibroma, adenosarcoma, histological types of endometrial carcinoma and grading of endometrial carcinomas are discussed with regard to endometrial biopsy specimens rather than hysterectomy specimens. The value of ancillary techniques, especially immunohistochemistry, is discussed where appropriate.

In many histopathology laboratories, endometrial specimens account for a major proportion of the workload. Most specimens are taken because of abnormal uterine bleeding or other related symptoms, and the pathologist is expected to exclude an endometrial cancer or a precancerous lesion. In some cases, a benign cause for abnormal uterine bleeding is identified, such as endometritis or endometrial polyp.

In this review, I will outline my approach to the interpretation of endometrial biopsy specimens, especially concentrating on areas which, in my experience, create difficulties for pathologists. Endometrial biopsy specimens are now rarely taken to date the endometrium and to assess whether ovulation has occurred, as serum measurements of various hormones give equivalent or more information.

In this review, dating of the endometrium will not be discussed, as this has been dealt with in detail recently.

My approach to the interpretation of endometrial biopsies and curettings

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Our endometrial pathology detection rates were comparable to yearly screening studies. BACKGROUND Although histological dating of endometrial biopsies OBJECTIVE AND RATIONALE This review outlines the recent major findings in.

Atrophic: Low gland-to-stroma ratio, thin cuboidal epithelium, no mitoses. Comes off in strips that resemble hair pins. Proliferative: Fuller, blue look to the stroma. Gland-to-stroma ratio approaches Glands are more donut-like and columnar. Secretory: Prominent spiral arterioles, edematous stroma. Secretory vacuoles and luminal secretions. May decidualize turns pink, ragged. Progestin-treated: Decidualized stroma but with flattened gland epithelium.

Dating endometrium, implantation

Endometrial biopsy. Common office procedures. Textbook of Family Medicine. Philadelphia, PA: Elsevier Benign endometrial proliferations mimicking malignancies: a review of problematic entities in small biopsy specimens. Benign proliferations that mimic malignancies are commonly encountered during the course of assessment of small and fragmented endometrial samples.

Secretory phase endometrium. endometrial dating pathology outlines. The effects of endometrium associated with the use of hormone in.

Advanced search Search Help Send feedback. Account Options Sign in Search settings. Pathology Outlines – Dating of endometrium www. Cached Similar. Endometrial histopathology-Basics – SlideShare www. How precise is histologic dating of endometrium using the standard My approach to the interpretation of endometrial biopsies and Correlation between endometrial dating of luteal phase days 6 and Searches related to dating of endometrium.

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Secretory phase endometrium

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Follow up of screening for endometrial hyperplasia Guidelines should be updated regularly and their review date should be included in their content. size, shape, position and orientation, outline and ultrasound characteristics using 3D ultrasound in the assessment of pathology and congenital malformations of the.

Filed under Pathology. Inflammatory and Infectious Processes. Nonspecific Endometritis. Specific Forms of Endometritis. Other Forms of Endometritis. Epithelial Metaplasias. Metaplasias to Nonspecific Cell Types. Atypical Polypoid Adenomyoma. Infections of the gynecologic tract are relatively common, and cause an enormous health impact.

Symptomatic infections are most commonly diagnosed based on the clinical examination and basic laboratory studies, and, as such, a tissue biopsy is generally not needed. An unknown fraction of STDs lead to asymptomatic infections, or to signs that are not recognized to be related to infection, such as dysfunctional uterine bleeding. Chronic endometritis has been shown to interfere with local expression of estrogen and progesterone receptors in the endometrium, which may also contribute to infertility.

Products of conception

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Background Endometrium acquires structural and functional HGEx-ERdb is a catalogue of all the genes, reported till date for their expression.

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Histopathology Uterus, endometrium–Proliferative endometriu


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