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Veterinary Ophthalmology May 2020To determine incidence and risk factors of post-sterilization hyphema in shelter cats.
OBJECTIVE
To determine incidence and risk factors of post-sterilization hyphema in shelter cats.
ANIMALS STUDIED
Retrospective medical record review of 1204 cats and prospective screening of 195 cats.
PROCEDURES
The study consisted of three parts: (a) Survey responses were collected from 20 veterinarians, who perform high-quality high-volume spay-neuter (HQHVSN) in both shelter and public clinic settings; (b) medical records of 1204 cats were analyzed retrospectively over a 14-month time period; and (c) ophthalmic examinations, including tonometry, were performed prospectively on 195 cats before and after sterilization surgery over 8 weeks.
RESULTS
Nine of 20 surveyed veterinarians reported having witnessed hyphema in cats following sterilization surgery. Retrospective review of 1204 medical record and prospective screening of 195 cats showed that three juvenile (<1 year of age) male cats (<2 kg) developed hyphema within 1 hour following surgery (0.2% incidence). In all three affected cats, anesthesia was induced with tiletamine/zolazepam (3 of 523 cats induced with this drug combination; 0.6% incidence), and hyphema resolved within 20 hours. Mean intraocular pressures as measured by Icare® TonoVet were (mean ± standard deviation) 11.5 ± 3.8 mm Hg and 21.7 ± 4.6 mm Hg for juvenile (<1 year of age) and adult (>1 year of age) cats, respectively.
CONCLUSIONS
Survey responses and three observed cases confirm the existence of feline post-sterilization hyphema with an estimated incidence of 0.2%. The underlying mechanism for this occurrence remains unknown.
Topics: Animals; Cats; Female; Hyphema; Hysterectomy; Incidence; Male; Michigan; Orchiectomy; Ovariectomy; Postoperative Complications; Prospective Studies; Records; Retrospective Studies
PubMed: 32216041
DOI: 10.1111/vop.12760 -
Cancer Prevention Research... Nov 2021Without preventive interventions, women with germline pathogenic variants in or have high lifetime risks for breast cancer and tubo-ovarian cancer. The increased risk... (Review)
Review
Without preventive interventions, women with germline pathogenic variants in or have high lifetime risks for breast cancer and tubo-ovarian cancer. The increased risk for breast cancer starts at a considerably younger age than that for tubo-ovarian cancer. Risk-reducing bilateral salpingo-oophorectomy (rrBSO) is effective in reducing tubo-ovarian cancer risk for and mutation carriers, but whether it reduces breast cancer risk is less clear. All studies of rrBSO and breast cancer risk are observational in nature and subject to various forms of bias and confounding, thus limiting conclusions that can be drawn about causation. Early studies supported a statistically significant protective association for rrBSO on breast cancer risk, which is reflected by several international guidelines that recommend consideration of premenopausal rrBSO for breast cancer risk reduction. However, these historical studies were hampered by the presence of several important biases, including immortal person-time bias, confounding by indication, informative censoring, and confounding by other risk factors, which may have led to overestimation of any protective benefit. Contemporary studies, specifically designed to reduce some of these biases, have yielded contradictory results. Taken together, there is no clear and consistent evidence for a role of premenopausal rrBSO in reducing breast cancer risk in or mutation carriers.
Topics: BRCA1 Protein; BRCA2 Protein; Breast Neoplasms; Female; Genetic Predisposition to Disease; Humans; Mutation; Ovarian Neoplasms; Ovariectomy; Risk; Salpingo-oophorectomy
PubMed: 34348913
DOI: 10.1158/1940-6207.CAPR-21-0141 -
Journal of the National Cancer Institute Jun 2023Gynecologic surgery is hypothesized to reduce risk of breast cancer; however, associations may be modified by subsequent hormone use. Our objective was to examine the...
BACKGROUND
Gynecologic surgery is hypothesized to reduce risk of breast cancer; however, associations may be modified by subsequent hormone use. Our objective was to examine the association between gynecologic surgery and breast cancer incidence considering the use of hormone therapy.
METHODS
The Sister Study is a prospective cohort of initially breast cancer-free women aged 35-74 years with a sister who had breast cancer. We used Cox proportional hazards models to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) for the association between gynecologic surgery (no surgery, hysterectomy only, bilateral oophorectomy with or without hysterectomy) and incident breast cancer among 50 701 women.
RESULTS
History of gynecologic surgery was common, with 13.8% reporting hysterectomy only and 18.1% reporting bilateral oophorectomy with or without hysterectomy. During follow-up (median = 11.4 years), 3948 cases were diagnosed. Compared with no surgery, bilateral oophorectomy was inversely associated with breast cancer (HR = 0.91, 95% CI = 0.83 to 1.00), and hysterectomy alone was positively associated (HR = 1.12, 95% CI = 1.02 to 1.23). Compared with no surgery and no hormone therapy, bilateral oophorectomy combined with estrogen only therapy (HR = 0.83, 95% CI = 0.74 to 0.94) was inversely associated with breast cancer, while hysterectomy combined with estrogen plus progestin therapy was positively associated with breast cancer (HR = 1.25, 95% CI = 1.01 to 1.55).
CONCLUSIONS
We observed an inverse association between bilateral oophorectomy and breast cancer risk. The positive association between hysterectomy and breast cancer may be due to concomitant estrogen plus progestin therapy.
Topics: Adult; Aged; Female; Humans; Middle Aged; Breast Neoplasms; Estrogens; Hormone Replacement Therapy; Hysterectomy; Incidence; Ovariectomy; Progestins; Proportional Hazards Models; Prospective Studies; Racial Groups; Risk Factors; Menopause; Body Mass Index; Neoplasm Invasiveness; Receptors, Estrogen
PubMed: 36806439
DOI: 10.1093/jnci/djad038 -
Journal of the National Cancer Institute Jan 2017Whether oophorectomy reduces breast cancer risk among BRCA mutation carriers is a matter of debate. We undertook a prospective analysis of bilateral oophorectomy and...
BACKGROUND
Whether oophorectomy reduces breast cancer risk among BRCA mutation carriers is a matter of debate. We undertook a prospective analysis of bilateral oophorectomy and breast cancer risk in BRCA mutation carriers.
METHODS
Subjects had no history of cancer, had both breasts intact, and had information on oophorectomy status (n = 3722). Women were followed until breast cancer diagnosis, prophylactic bilateral mastectomy, or death. A Cox regression model was used to estimate the hazard ratios (HRs) and 95% confidence intervals (CIs) of breast cancer associated with oophorectomy (coded as a time-dependent variable). All statistical tests were two-sided.
RESULTS
Over a mean follow-up of 5.6 years, 350 new breast cancers were diagnosed. Among women with a BRCA1 or BRCA2 mutation, oophorectomy was not associated with breast cancer risk compared with women who did not undergo an oophorectomy. The age-adjusted hazard ratio associated with oophorectomy was 0.96 (95% CI = 0.73 to 1.26, P = 76) for BRCA1 and was 0.65 (95% CI = 0.37 to 1.16, P = 14) for BRCA2 mutation carriers. In stratified analyses, the effect of oophorectomy was statistically significant for breast cancer in BRCA2 mutation carriers diagnosed prior to age 50 years (age-adjusted HR = 0.18, 95% CI = 0.05 to 0.63, P = 007). Oophorectomy was not associated with risk of breast cancer prior to age 50 years among BRCA1 mutation carriers (age-adjusted HR = 0.79, 95% CI = 0.55 to 1.13, P = 51).
CONCLUSIONS
Findings from this large prospective study support a role of oophorectomy for the prevention of premenopausal breast cancer in BRCA2, but not BRCA1 mutation carriers. These findings warrant further evaluation.
Topics: Adolescent; Adult; Age Factors; Aged; Aged, 80 and over; Breast Neoplasms; Female; Follow-Up Studies; Genes, BRCA1; Genes, BRCA2; Heterozygote; Humans; Incidence; Middle Aged; Mutation; Ovariectomy; Prophylactic Surgical Procedures; Prospective Studies; Young Adult
PubMed: 27601060
DOI: 10.1093/jnci/djw177 -
American Journal of Obstetrics and... Jan 2024This study aimed to provide an up-to-date systematic review of "the long-term outcomes of bilateral salpingo-oophorectomy at the time of hysterectomy" and perform a... (Meta-Analysis)
Meta-Analysis Review
OBJECTIVE
This study aimed to provide an up-to-date systematic review of "the long-term outcomes of bilateral salpingo-oophorectomy at the time of hysterectomy" and perform a meta-analysis for the reported associations.
DATA SOURCES
Our study updated a previous systematic review by searching the literature using PubMed, Web of Science, and Embase for publications between January 2015 and August 2022.
STUDY ELIGIBILITY CRITERIA
Our study included studies of women who had a hysterectomy with bilateral salpingo-oophorectomy vs women who had a hysterectomy with ovarian conservation or no surgery.
METHODS
The quality of the evidence was assessed using the Grading of Recommendations, Assessment, Development and Evaluations. Adjusted hazard ratios were extracted and combined to obtain fixed effect estimates.
RESULTS
Compared with hysterectomy or no surgery, hysterectomy with bilateral salpingo-oophorectomy in young women was associated with decreased risk of breast cancer (hazard ratio, 0.78; 95% confidence interval, 0.73-0.84) but with an increased risk of colorectal cancer (hazard ratio, 1.27; 95% confidence interval, 1.10-1.47). In addition, it was associated with an increased risk of total cardiovascular diseases, coronary heart disease, and stroke with hazard ratios of 1.18 (95% confidence interval, 1.11-1.25), 1.17 (95% confidence interval, 1.10-1.25), and 1.20 (95% confidence interval, 1.10-1.31), respectively. Compared with no surgery, hysterectomy with bilateral salpingo-oophorectomy before the age of 50 years was associated with an increased risk of hyperlipidemia (hazard ratio, 1.44; 95% confidence interval, 1.25-1.65), diabetes mellitus (hazard ratio, 1.16; 95% confidence interval, 1.09-1.24), hypertension (hazard ratio, 1.13; 95% confidence interval, 1.06-1.20), dementia (hazard ratio, 1.70; 95% confidence interval, 1.07-2.69), and depression (hazard ratio, 1.39; 95% confidence interval, 1.22-1.60). The evidence on the association with all-cause mortality in young women showed substantial heterogeneity between the studies (I=85%; P<.01).
CONCLUSION
Hysterectomy with bilateral salpingo-oophorectomy was associated with multiple long-term outcomes. The benefits of the addition of bilateral salpingo-oophorectomy to hysterectomy should be balanced against the risks.
Topics: Female; Humans; Middle Aged; Salpingo-oophorectomy; Ovariectomy; Hysterectomy; Cardiovascular Diseases; Diabetes Mellitus
PubMed: 37364803
DOI: 10.1016/j.ajog.2023.06.043 -
JAMA Network Open Nov 2021The associations of bilateral oophorectomy among premenopausal women, age at oophorectomy, and use of estrogen therapy after oophorectomy with cognitive performance...
IMPORTANCE
The associations of bilateral oophorectomy among premenopausal women, age at oophorectomy, and use of estrogen therapy after oophorectomy with cognitive performance later in life remain controversial.
OBJECTIVE
To investigate whether women who underwent premenopausal bilateral oophorectomy were at increased risk of mild cognitive impairment (MCI) and experienced decreased global or domain-specific cognitive performance.
DESIGN, SETTING, AND PARTICIPANTS
This case-control study and cross-sectional study were made possible by combining data from the Mayo Clinic Study of Aging (MCSA) and the Rochester Epidemiology Project (REP) medical record-linkage system. The studies were conducted among a population-based sample in Olmsted County, Minnesota, consisting of 2732 women aged 50 to 89 years who participated in the MCSA study from 2004 to 2019 and underwent a clinical evaluation and comprehensive cognitive testing. Data were analyzed from January to May 2021.
EXPOSURES
Medical record documentation of bilateral oophorectomy abstracted from a medical record-linkage system (ie, REP).
MAIN OUTCOMES AND MEASURES
Odds of MCI and global or domain-specific z scores on cognitive tests were measured at the first MCSA visit. The median (IQR) lag time between bilateral oophorectomy performed before menopause and before age 50 years and cognitive evaluation was 30 (22-38) years.
RESULTS
Among 2732 women aged 50 to 89 years (median [IQR] age at evaluation, 74 [66-81] years) who participated in the MCSA, the case-control study included 283 women with MCI (10.4%) and 2449 women without cognitive impairment (89.6%). Bilateral oophorectomy before menopause and before age 46 years was associated with clinically diagnosed MCI (adjusted odds ratio [aOR], 2.21; 95% CI, 1.41-3.45; P < .001) compared with no bilateral oophorectomy. The presence of an association with MCI varied by surgical indication, with an association among 259 women with bilateral oophorectomy before menopause and before age 50 years for the indication of benign ovarian condition (aOR, 2.43; 95% CI, 1.36-4.33; P = .003) but not for cancer or no ovarian condition. The presence of an association did not vary by estrogen therapy after bilateral oophorectomy, with associations among women aged less than 46 years with estrogen therapy (aOR, 2.56; 95% CI, 1.24-5.31; P = .01) and without estrogen therapy (aOR, 2.05; 95% CI, 1.18-3.52; P = .01). The cross-sectional study included 625 women with a history of bilateral oophorectomy (median [IQR] age, 75 [70-82] years) and 2107 women without a history of bilateral oophorectomy (median [IQR] age, 73 [65-80] years). Premenopausal bilateral oophorectomy was performed before age 46 years among 161 women and was associated with decreased global cognition z score (β, -0.17; 95% CI, -0.32 to -0.03; P = .02), attention and executive domain z score (β, -0.21; 95% CI, -0.36 to -0.05; P = .009), and Short Test of Mental Status score (β, -0.51; 95% CI, -0.95 to -0.08; P = .02) compared with no bilateral oophorectomy.
CONCLUSIONS AND RELEVANCE
This study found that women who underwent bilateral oophorectomy before menopause had increased odds of MCI and poorer performance on cognitive tests approximately 30 years later compared with women who did not undergo bilateral oophorectomy.
Topics: Aged; Aged, 80 and over; Case-Control Studies; Cognition; Cognitive Dysfunction; Female; Humans; Middle Aged; Minnesota; Ovariectomy; Premenopause; Risk Factors
PubMed: 34762113
DOI: 10.1001/jamanetworkopen.2021.31448 -
Climacteric : the Journal of the... Oct 2021In this invited review, we discuss some unresolved and controversial issues concerning premature (<40 years) or early (40-45 years) bilateral oophorectomy. First, we...
In this invited review, we discuss some unresolved and controversial issues concerning premature (<40 years) or early (40-45 years) bilateral oophorectomy. First, we clarify the terminology. Second, we summarize the long-term harmful consequences of bilateral oophorectomy. Third, we discuss the restrictive indications for bilateral oophorectomy in premenopausal women to prevent ovarian cancer that are justified by the current scientific evidence. Fourth, we explain the importance of estrogen replacement therapy when bilateral oophorectomy is performed. Hormone replacement therapy is indicated after bilateral oophorectomy until the age of expected natural menopause like in premature or early primary ovarian insufficiency. Fifth, we discuss the relationship between adverse childhood experiences, adverse adult experiences, mental health, gynecologic symptoms and bilateral oophorectomy. The acceptance and popularity of bilateral oophorectomy over several decades, and its persistence even in the absence of supporting scientific evidence, suggest that non-medical factors related to sex, gender, reproduction, cultural beliefs and socioeconomic structure are involved. We discuss some of these non-medical factors and the need for more research in this area.
Topics: Adult; Estrogen Replacement Therapy; Female; Humans; Menopause; Menopause, Premature; Ovariectomy; Primary Ovarian Insufficiency
PubMed: 33719814
DOI: 10.1080/13697137.2021.1893686 -
Obstetrics and Gynecology Oct 2022To evaluate the association of primary infertility with subsequent bilateral oophorectomy and hysterectomy, using a population-based cohort of women with primary...
OBJECTIVE
To evaluate the association of primary infertility with subsequent bilateral oophorectomy and hysterectomy, using a population-based cohort of women with primary infertility and age-matched women in a referent group.
METHODS
The Rochester Epidemiology Project record-linkage system was used to assemble a population-based cohort of women with primary infertility diagnosed between 1980 and 1999 (index date). Women were age-matched (±1 year) 1:1 to women without a history of infertility or hysterectomy at the index date (referent group). Cox proportional hazards models were fit to compare long-term risks of bilateral oophorectomy and hysterectomy, respectively, between women with infertility and women in the referent group.
RESULTS
Among both groups of 1,001 women, the mean age at the index date was 29.2±4.4 years. Median duration of follow-up was 23.7 years for both groups. Women with primary infertility were 1.7 times (adjusted hazard ratio [aHR] 1.69, 95% CI 1.22-2.33) more likely to undergo bilateral oophorectomy compared with women in the referent group. In a sensitivity analysis that excluded women with a diagnosis of infertility related to endometriosis and their matched referent group participants, this association persisted (aHR 1.50, 95% CI 1.06-2.14). Women with primary infertility did not have a significant increased risk of hysterectomy (aHR 0.98, 95% CI 0.79-1.23). However, risk of hysterectomy was increased in those with primary infertility related to endometriosis (aHR 1.94, 95% CI 1.12-3.34). We observed that women with primary infertility were more likely to undergo hysterectomy with bilateral oophorectomy. Women in the referent group were more likely to undergo hysterectomy with ovarian conservation. Few women in either group had isolated bilateral oophorectomy.
CONCLUSION
Primary infertility, with and without a diagnosis of endometriosis, is associated with an increased risk of bilateral oophorectomy. In women with endometriosis-related infertility, there is an association with future hysterectomy. These findings represent important confounders in the evaluation of long-term health outcomes related to primary infertility.
Topics: Female; Humans; Young Adult; Adult; Endometriosis; Ovariectomy; Hysterectomy; Cohort Studies; Infertility; Risk Factors
PubMed: 36075082
DOI: 10.1097/AOG.0000000000004916 -
Risk of colorectal cancer with hysterectomy and oophorectomy: A systematic review and meta-analysis.International Journal of Surgery... Oct 2016Colorectal cancer (CRC) is the second most commonly diagnosed cancer worldwide in females. Sex hormones may play a protective effect in CRC pathogenesis. Ovarian sex... (Meta-Analysis)
Meta-Analysis Review
BACKGROUND
Colorectal cancer (CRC) is the second most commonly diagnosed cancer worldwide in females. Sex hormones may play a protective effect in CRC pathogenesis. Ovarian sex steroid levels are reduced in premenopausal women after hysterectomy. Prospective studies have revealed an 80% decrease in serum oestradiol levels after bilateral oophorectomy in premenopausal women. We aimed to elucidate the relationship between hysterectomy or oophorectomy and risk of CRC.
METHODS
We estimated relative risk (RR) and 95% confidence intervals (95% CIs) with the meta-analysis. Cochran's Q test and Higgins I statistic were used to check for heterogeneity. Subgroup and sensitivity analyses were performed as were Egger's and Begg's tests and the "trim-and-fill" method for publication bias analysis.
RESULTS
Risk of CRC was increased 30% for women undergoing oophorectomy relative to the general population and 24% with hysterectomy relative to no surgery. The risk was increased 22% with hysterectomy with bilateral salpingoo-ophorectomy as compared with simple hysterectomy. On subgroup analysis, risk of rectal cancer was increased 28% and colon cancer 19% with hysterectomy. Europeans seem to be sensitive to the risk of CRC, with 27% increased risk after hysterectomy. The risk of CRC after oophorectomy gradually increased with age at oophorectomy. The risk was greater with bilateral oophorectomy, with 36% increased risk, than unilateral oophorectomy, with 20% increased risk. Risk was increased 66% with time since oophorectomy 1-4 years as compared with 5-9 and ≥ 10 years.
CONCLUSIONS
Risk of CRC was increased for women undergoing hysterectomy or oophorectomy. Women with susceptibility genes for ovarian cancer or metrocarcinoma should choose oophorectomy or hysterectomy. For women not at high risk for these cancers, oophorectomy or hysterectomy should not be recommended for increasing the subsequent risk of CRC.
Topics: Adult; Aged; Colorectal Neoplasms; Female; Gonadal Steroid Hormones; Humans; Hysterectomy; Middle Aged; Ovariectomy; Premenopause; Prospective Studies; Risk Factors
PubMed: 27568653
DOI: 10.1016/j.ijsu.2016.08.518 -
Cancer Epidemiology, Biomarkers &... Jul 2021Bilateral oophorectomy during a nonmalignant hysterectomy is frequently performed for ovarian cancer prevention in premenopausal women. Oophorectomy before menopause...
BACKGROUND
Bilateral oophorectomy during a nonmalignant hysterectomy is frequently performed for ovarian cancer prevention in premenopausal women. Oophorectomy before menopause leads to an abrupt decline in ovarian hormones that could adversely affect body composition. We examined the relationship between oophorectomy and whole-body composition.
METHODS
Our study population included cancer-free women 35 to 70 years old from the 1999-2006 National Health and Nutrition Examination Survey, a representative sample of the U.S.
POPULATION
A total of 4,209 women with dual-energy x-ray absorptiometry scans were identified, including 445 with hysterectomy, 552 with hysterectomy and oophorectomy, and 3,212 with no surgery. Linear regression was used to estimate the difference in total and regional (trunk, arms, and legs) fat and lean body mass by surgery status.
RESULTS
In multivariable models, hysterectomy with and without oophorectomy was associated with higher total fat mass [mean percent difference (β); β: 1.61%; 95% confidence interval (CI), 1.00-2.28; β: 0.88%; 95% CI, 0.12-1.58] and lower total lean mass [β: -1.48%; 95% CI, -2.67, -1.15; β: -0.87%; 95% CI, -1.50, -0.24) compared with no surgery. Results were stronger in women with a normal body mass index (BMI) and those <45 years at surgery. All body regions were significantly affected for women with oophorectomy, whereas only the trunk was affected for women with hysterectomy alone.
CONCLUSIONS
Hysterectomy with oophorectomy, particularly in young women, may be associated with systemic changes in fat and lean body mass irrespective of BMI.
IMPACT
Our results support prospective evaluation of body composition in women undergoing hysterectomy with oophorectomy at a young age.
Topics: Absorptiometry, Photon; Adiposity; Adult; Age Factors; Aged; Body Mass Index; Cross-Sectional Studies; Female; Humans; Hysterectomy; Leiomyoma; Middle Aged; Nutrition Surveys; Ovarian Neoplasms; Ovariectomy; Prophylactic Surgical Procedures; Risk Factors; United States
PubMed: 33879451
DOI: 10.1158/1055-9965.EPI-20-1849