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关于Viril定理的讨论 被引量:1
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作者 刘文中 陈黎 《北京师范大学学报(自然科学版)》 CAS CSCD 北大核心 2000年第2期195-197,共3页
就一些现行教科书中Viril定理的叙述及证明提出质疑 .N体系统成为稳定系统的必要条件在这些书中被表示为系统转动惯量对时间的二阶导数为零 (¨I =0 ) ,而三体问题中的稳定特解———等边三角形特解却给出了一个反例 .相应的修正是 ... 就一些现行教科书中Viril定理的叙述及证明提出质疑 .N体系统成为稳定系统的必要条件在这些书中被表示为系统转动惯量对时间的二阶导数为零 (¨I =0 ) ,而三体问题中的稳定特解———等边三角形特解却给出了一个反例 .相应的修正是 :将 ¨I =0改为〈¨I〉 =0 . 展开更多
关键词 N体问题 Viril定理 稳定性 质心惯性坐标系
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Sclerosing stromal tumor of the ovary with masculinization,Meig’s syndrome and CA125 elevation in an adolescent girl:A case report 被引量:2
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作者 Qian Chen Yi-Hong Chen +2 位作者 Hui-Yun Tang Yang-Mei Shen Xin Tan 《World Journal of Clinical Cases》 SCIE 2020年第24期6364-6372,共9页
BACKGROUND Sclerosing stromal tumor (SST) is an extremely rare sex cord stromal tumor of theovary. It was first reported and named in 1973. These tumors typically presentwith pelvic/abdominal pain and tenderness, a ma... BACKGROUND Sclerosing stromal tumor (SST) is an extremely rare sex cord stromal tumor of theovary. It was first reported and named in 1973. These tumors typically presentwith pelvic/abdominal pain and tenderness, a mass, and/or abnormal menses,but rarely present with masculinity in children and adolescents. Only 2 cases ofthese tumors have been reported in premenarchal girls, who demonstratedhormonal activity, with a history of the development of a virilizing female due tohyperandrogenism. Here, we report a case of a giant SST with obviousmasculinity combined with Meig’s syndrome and CA125 elevation.CASE SUMMARY A 17-year-old female presented with a 7-year history of the development ofmasculinity and a 2-year history of amenorrhea. She had hirsutism, acne, obviouslaryngeal prominence, and voice deepening. Physical examination showed a malesuprapubic hair pattern and a 4.0 cm × 1.5 cm enlarged clitoris. Laboratory testsshowed that the testosterone level was > 15.00 ng/mL (normal range: 0.14-0.76ng/mL), and androstenedione level was > 10.00 ng/mL (normal range: 0.3-3.3ng/mL). A computed tomography scan of the abdomen and pelvis was carriedout and showed a large, solid and cystic, partly calcified pelvic mass in the rightovary measuring 27.1 cm × 20.0 cm × 11.0 cm, 15 cm above the umbilicus (to thelevel of the upper part of L1). Intraoperative findings at laparotomy revealed alarge tumor arising from the right ovary. Approximately, 500 mL of pale-yellow clear liquid was found in the pelvic cavity. A right salpingo-oophorectomy wasperformed. Microscopic examination and immunohistochemical staining of thesurgical specimen showed an SST of the ovary.CONCLUSION This report is remarkable as our patient was not only diagnosed with an SST ofthe ovary, which is extremely rare in this age group, but was the largest and mostobvious reported patient with this tumor who presented with virilization.Therefore, gynecologists should be aware of this potential complication inadolescent girls with a mass in the ovary. 展开更多
关键词 Ovarian tumor Sclerosing stromal tumor ANDROGENS ADOLESCENT VIRILIZATION Case report Sex cord-stromal tumor
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Gonadal dysgenesis in Turner syndrome with Y-chromosome mosaicism:Two case reports
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作者 Xue-Fei Leng Ke Lei +4 位作者 Yi Li Fei Tian Qin Yao Qing-Mei Zheng Zhi-Hong Chen 《World Journal of Clinical Cases》 SCIE 2020年第22期5737-5743,共7页
BACKGROUND Turner syndrome(TS)has a variety of different karyotypes,with a wide range of phenotypic features,but the specific karyotype may not always predict the phenotype.TS with Y chromosome mosaicism may have mixe... BACKGROUND Turner syndrome(TS)has a variety of different karyotypes,with a wide range of phenotypic features,but the specific karyotype may not always predict the phenotype.TS with Y chromosome mosaicism may have mixed gonadal dysgenesis,and the mosaicism is related to the potential for gonadoblastoma.CASE SUMMARY In this case report,we report two cases of TS with different karyotypes and gonadal dysgenesis.Patient 1 had obvious virilization,and was positive for the SRY gene,but her karyotype in peripheral blood lymphocytes was 45X.Patient 2 had a mosaic karyotype,45X/46X,dic(Y:Y)(p11.3:p11.2),and the proportion of Y-bearing cells was 50%in peripheral blood lymphocytes,but the patient had normal female external genitalia and streaky gonads,with no genital virilism.Different tissues in the same TS individual may exhibit different ratios of mosaicism.The gonadal determination and differentiation of mosaic TS are primarily dependent on the predominant cell line in the gonads.CONCLUSION In TS patients with virilization,it is necessary to test at least two to three tissues to search for cryptic Y material. 展开更多
关键词 Turner syndrome Gonadal dysgenesis VIRILIZATION Y chromosome mosaicism GONADOBLASTOMA Case report
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Sertoli-Leydig Cell Tumor from Latifa Hospital, Dubai UAE: Case Report
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作者 Z. Almahloul A. B. Fazari +2 位作者 L. Paulose Z. Nagshabandi T. Gergawi 《Open Journal of Obstetrics and Gynecology》 2020年第2期319-325,共7页
Sertoli-Leydig cell tumors (SLCTs) are rare tumors. Mass and pain are the presenting feature. The varying histopathology and differentiation of this tumor present difficulties with proper diagnosis and development of ... Sertoli-Leydig cell tumors (SLCTs) are rare tumors. Mass and pain are the presenting feature. The varying histopathology and differentiation of this tumor present difficulties with proper diagnosis and development of optimal treatment regimens. The prognosis depends on tumors grading and staging. Surgery is main stay management option. Chemotherapy and radiation options are still of choice.?We aimed?to?present Sertoli-Leydig cell tumor managed surgical at Latifa Hospital in Dubai, UAE with acceptable outcome and good patient satisfaction. 展开更多
关键词 Ovarian TUMORS Sertoli-Leydig Cell TUMORS Clitoromegaly VIRILIZATION
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Testosterone undecanoate supplementation together with human chorionic gonadotropin does not impair spermatogenesis in males with isolated hypogonadotropic hypogonadism:a retrospective study
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作者 Yin-Wei Chen Yong-Hua Niu +6 位作者 Hao Xu Dao-Qi Wang Hong-Yang Jiang Gaurab Pokhrel Tao Wang Shao-Gang Wang Ji-Hong Liu 《Asian Journal of Andrology》 SCIE CAS CSCD 2019年第4期413-418,共6页
Gon adotropin therapy is comm only used to in duce virilizati on and spermatoge nesis in male isolated hypog on adotropic hypog on adism (IHH) patients. In clinical practice, 5.6%-15.0% of male IHH patients show poor ... Gon adotropin therapy is comm only used to in duce virilizati on and spermatoge nesis in male isolated hypog on adotropic hypog on adism (IHH) patients. In clinical practice, 5.6%-15.0% of male IHH patients show poor responses to gonadotropin treatment;therefore, testosterone (T) suppleme ntation can serve as an alter native therapy to no rmalize serum T levels and promote virilization. However, treatment with exogenous T impairs spermatogenesis and suppresses intratesticular T levels. This retrospective study aimed to determine whether oral testosterone undeca noate (TU) suppleme ntation together with human chorionic gonadotropin (hCG) would negatively affect spermatogenesis in IHH patients compared with hCG alone. One hundred and seven IHH patients were included in our study. Fifty-four patients received intramuscular hCG and oral TU, and 53 patients received intramuscular hCG alone. The median follow-up time was 29 (range: 12-72) mon ths in both groups. Compared with the hCG group, the hCG/TU group required a shorter median time to normalize serum T levels (P < 0.001) and achieve Tanner stage (III and V) of pubic hair and genital development (P < 0.05). However, there were no significant differences in the rate of seminal spermatozoa appearance, sperm concentration, or median time to achieve different sperm concentration thresholds between the groups. In addition, there were no significant differences in side effects, such as acne and gynecomastia, observed in both groups. This study indicates that oral TU supplementation together with hCG does not impair spermatogenesis in treated IHH patients compared with hCG alone, and it shortens the time to normalize serum T levels and promote virilization. 展开更多
关键词 human chorionic GONADOTROPIN ISOLATED hypogonadotropic HYPOGONADISM SPERMATOGENESIS TESTOSTERONE undecanoate VIRILIZATION
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