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Kachlík D, Naňka O, Blanková A, Turyna R, Csöbönyeiová M, Varga I. A unique anatomical variation of the vascular supply of the ovary, uterine tube, and uterus from the greater omentum – an anatomical case study. Physiol Res 2022. [DOI: 10.33549/physiolres.935034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
It is well known that the blood supply of the greater omentum and female internal genital organs are not physiologically connected. There is also no mention of such anatomical variation in anatomical, radiological, or surgical textbooks. Here we present a very rare case report of atypical double arterial anastomosis (the first and second variant artery) between the right limb of the omental arcade of Barkow, uterus, and right ovary, which was found during a routine student anatomical dissection course. It is very challenging to find a proper explanation for the presence of the described anatomical variation; however, we hypothesized that it is based on their common embryonic origin - the mesentery. The first and second variant arteries could be remnants of transient anastomoses or collateral circulation, which were present during embryonic development and persisted until adulthood. Moreover, during our literature review, we noticed that the general description of omental blood supply and its possible variations is relatively poor; therefore, we emphasize the need for more precise knowledge regarding these anatomical parts, which could help surgeons who are performing abdominal or pelvic surgeries in preventing avoidable bleeding.
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Affiliation(s)
- D Kachlík
- Department of Anatomy, Second Faculty of Medicine, Charles University, Prague, Czech Republic.
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Sajan A, Hakmi H, Griepp DW, Sohail AH, Liu H, Halpern D. Herniation Through Defects in the Broad Ligament. JSLS 2021; 25:JSLS.2020.00112. [PMID: 34248336 PMCID: PMC8241289 DOI: 10.4293/jsls.2020.00112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Background We sought to assess hernia characteristics and classification through comprehensive review of the literature involving broad ligament herniation. Methods A literature search via MEDLINE and Embase databases was conducted to identify and select broad ligament herniation studies published between January 1, 2000 and September 30, 2020. Extracted data included previous surgical history, previous obstetric history, diagnostic imaging, herniated organ, hernia classification, and repair performed. The reported data has been compared to a unique case of broad ligament herniation that presented to our institution. Results A total of 44 articles with 49 cases were identified for the study. Eighteen (36.7%) patients had a history of previous abdominal surgery while 29 (59.2%) had a history of previous childbirth. Type I (51.0%) and Type II (18.4%) defects were most commonly reported with most patients reporting only one defect (85.7%) using the Cilley classification. Twenty-nine patients underwent primary laparoscopic repair of the defect while 19 patients underwent exploratory laparotomy. Conclusions The analysis of previously reported cases adds to the limited literature on broad ligament hernias and highlights the surgical management of this uncommon pathology. It also highlights the need for a broad differential diagnosis when female patients present with pelvic pain or symptoms of small bowel obstruction. The broad ligament should be fully inspected when mesenteric defects are suspected as multiple defects can be present as evidenced by the attached case study.
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Affiliation(s)
- Abin Sajan
- Department of Surgery, NYU Langone Hospital - Long Island, Mineola, NY
| | - Hazim Hakmi
- Department of Surgery, NYU Langone Hospital - Long Island, Mineola, NY
| | - Daniel W Griepp
- College of Medicine, New York Institute of Technology, Old Westbury, NY
| | - Amir H Sohail
- Department of Surgery, NYU Langone Hospital - Long Island, Mineola, NY
| | - Helen Liu
- Department of Surgery, NYU Langone Hospital - Long Island, Mineola, NY
| | - David Halpern
- Department of Surgery, NYU Langone Hospital - Long Island, Mineola, NY
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Unal E, Karakaya AA, Beştaş A, Yıldırım R, Taş FF, Onay H, Özkınay F, Haspolat YK. Identification of four novel variant in the AMHR2 gene in six unrelated Turkish families. J Endocrinol Invest 2021; 44:1301-1307. [PMID: 33025551 DOI: 10.1007/s40618-020-01437-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 09/26/2020] [Indexed: 11/26/2022]
Abstract
PURPOSE Persistent Müllerian duct syndrome (PMDS) is characterized by the persistence of Müllerian structures in male with normal phenotype. Most cases occur as a result of mutations in the anti-Müllerian hormone (AMH) or AMHR2 genes. In this study, we aim to discuss the results of clinical, laboratory, and molecular genetic analysis of cases detected to have AMHR2 gene mutation. METHODS A total of 11 cases from 6 families were included in the study. AMHR2 gene mutation analyses were performed by sequencing of the coding exons and the exon-intron boundaries of the genes. The American College of Medical Genetics guidelines were used for the classification of the detected variants. RESULTS Six of the 11 cases were admitted due to bilateral undescended testes and five cases due to inguinal hernia (three transverse testicular ectopia and two hernia uterus inguinalis). All cases had normal AMH levels. Seven different variants were identified in the six families. The variants detected in four cases were considered novel (c.78del, c.71G > A, c.1460dup, c.1319A > G). Two of the novel variants were missense (exon 2 and exon 10) mutations, one was deletion (exon 2), and one duplication (exon 11). CONCLUSION We identified four novel mutations in the AMHR2 gene resulting in PMDS. Duplication mutation (c.1460dup) in the AMHR2 gene causing PMDS was demonstrated for the first time. The most important complications of PMDS are infertility and malignancy. Early diagnosis is vital to preventing malignancy. Vas deferens and vascular structures may be injured during orchiopexy. Therefore, patients should always be referred to experienced clinics.
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MESH Headings
- Anti-Mullerian Hormone/blood
- Child, Preschool
- Consanguinity
- Disorder of Sex Development, 46,XY/diagnosis
- Disorder of Sex Development, 46,XY/genetics
- Disorder of Sex Development, 46,XY/physiopathology
- Early Diagnosis
- Humans
- Infertility, Male/diagnosis
- Infertility, Male/etiology
- Male
- Mutation
- Neoplasms/diagnosis
- Neoplasms/etiology
- Neoplasms/prevention & control
- Pedigree
- Receptors, Peptide/genetics
- Receptors, Transforming Growth Factor beta/genetics
- Turkey
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Affiliation(s)
- E Unal
- Department of Pediatric Endocrinology, Faculty of Medicine, Dicle University, Diyarbakir, Turkey.
| | - A A Karakaya
- Department of Pediatric Endocrinology, Faculty of Medicine, Dicle University, Diyarbakir, Turkey
| | - A Beştaş
- Department of Pediatric Endocrinology, Faculty of Medicine, Dicle University, Diyarbakir, Turkey
| | - R Yıldırım
- Department of Pediatric Endocrinology, Diyarbakır Children's Hospital, Diyarbakir, Turkey
| | - F F Taş
- Department of Pediatric Endocrinology, Gazi Yaşargil Training and Research Hospital, Diyarbakir, Turkey
| | - H Onay
- Department of Medical Genetics, Faculty of Medicine, Ege University, Izmir, Turkey
| | - F Özkınay
- Department of Medical Genetics, Faculty of Medicine, Ege University, Izmir, Turkey
| | - Y K Haspolat
- Department of Pediatric Endocrinology, Faculty of Medicine, Dicle University, Diyarbakir, Turkey
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4
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Picard JY, Josso N. Persistent Müllerian duct syndrome: an update. Reprod Fertil Dev 2020; 31:1240-1245. [PMID: 32172781 DOI: 10.1071/rd17501] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 12/06/2018] [Indexed: 11/23/2022] Open
Abstract
Male sex differentiation is driven by two hormones, testosterone and anti-Müllerian hormone (AMH), responsible for regression of Müllerian ducts in male fetuses. Mutations inactivating AMH or AMH receptor type 2 (AMHR2) are responsible for persistent Müllerian duct syndrome (PMDS) in otherwise normally virilised 46,XY males. This review is based on published cases, including 157 personal ones. PMDS can present in one of three ways: bilateral cryptorchidism, unilateral cryptorchidism with contralateral hernia and transverse testicular ectopia. Abnormalities of male excretory ducts are frequent. Testicular malignant degeneration occurs in 33% of adults with PMDS. Cancer of Müllerian derivatives is less frequent. Fertility is rare but possible if at least one testis is scrotal and its excretory ducts are intact. Up to January 2019, 81 families with 65 different mutations of the AMH gene, mostly in exons 1, 2 and 5, have been identified. AMHR2 gene mutations comprising 64 different alleles have been discovered in 79 families. The most common mutation, a 27-bp deletion in the kinase domain, was found in 30 patients of mostly Northern European origin. In 12% of cases, no mutation of AMH or AMHR2 has been detected, suggesting a disruption of other pathways involved in Müllerian regression.
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Affiliation(s)
- Jean-Yves Picard
- INSERM UMRS 938, Centre de Recherche Saint Antoine, 27, rue Chaligny, 75571 Paris Cedex 12, France; and Faculté de Médecine Sorbonne Université, 27, rue Chaligny, 75571 Paris Cedex 12, France; and Corresponding author.
| | - Nathalie Josso
- INSERM UMRS 938, Centre de Recherche Saint Antoine, 27, rue Chaligny, 75571 Paris Cedex 12, France; and Faculté de Médecine Sorbonne Université, 27, rue Chaligny, 75571 Paris Cedex 12, France
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Smooth Muscle Tumors of the Visceral Adnexal and Uterine Ligaments and Adnexal Connective Tissue. Int J Gynecol Pathol 2020; 39:55-67. [DOI: 10.1097/pgp.0000000000000578] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Mullen RD, Ontiveros AE, Moses MM, Behringer RR. AMH and AMHR2 mutations: A spectrum of reproductive phenotypes across vertebrate species. Dev Biol 2019; 455:1-9. [PMID: 31301298 PMCID: PMC6754765 DOI: 10.1016/j.ydbio.2019.07.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 06/04/2019] [Accepted: 07/09/2019] [Indexed: 01/02/2023]
Abstract
Anti-Müllerian hormone (AMH) is a member of the Transforming Growth Factor-β family of secreted signaling proteins. AMH is expressed in Sertoli cells of the fetal and adult testes and granulosa cells of the postnatal ovary. AMH is required for the regression of the Müllerian ducts in mammalian fetuses during male differentiation. AMH signals through its Type II receptor, AMHR2. AMHR2 is expressed in mesenchyme adjacent to the Müllerian ducts, and in Sertoli, Leydig, and granulosa cells. Although AMH and AMHR2 genes have been identified in numerous vertebrate species, spontaneous or engineered mutations or variants have been found or created in only a few mammals and teleost fishes. AMH or AMHR2 mutations in mammals lead to the development of Persistent Müllerian Duct Syndrome (PMDS), a recessive condition in which affected males are fully virilized but retain Müllerian duct-derived tissues, including a uterus and oviducts, and in human and dog, undescended testes. Amh mutant female mice had accelerated ovarian primordial follicle recruitment, suggesting a role for AMH in regulating germ cells. amh and amhr2 mutations have also been experimentally generated in various teleost fishes. Depending on the fish species, loss of AMH signaling results in infertility, germ cell tumors, or male-to-female sex reversal. Here we compare the spectrum of phenotypes caused by AMH and AMHR2 mutations in a variety of vertebrate species. There are both common and unique phenotypes between species, highlighting the range of biological processes regulated by AMH signaling.
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Affiliation(s)
- Rachel D Mullen
- Department of Genetics, University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Alejandra E Ontiveros
- Department of Genetics, University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA; Program in Developmental Biology, Baylor College of Medicine, Houston, Texas, 77030, USA
| | - Malcolm M Moses
- Department of Genetics, University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA; Program in Genetics and Epigenetics, MD Anderson Cancer Center UT Health Graduate School of Biomedical Sciences, Houston, TX, 77030, USA
| | - Richard R Behringer
- Department of Genetics, University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA; Program in Developmental Biology, Baylor College of Medicine, Houston, Texas, 77030, USA; Program in Genetics and Epigenetics, MD Anderson Cancer Center UT Health Graduate School of Biomedical Sciences, Houston, TX, 77030, USA.
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Kaniewska M, Gołofit P, Heubner M, Maake C, Kubik-Huch RA. Suspensory Ligaments of the Female Genital Organs: MRI Evaluation with Intraoperative Correlation. Radiographics 2019; 38:2195-2211. [PMID: 30422765 DOI: 10.1148/rg.2018180089] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The uterus, which plays an important role in the reproductive process, provides a home for the developing fetus and so must be in a stable, though flexible, location. Various structures with suspensory ligaments help provide this berth. MRI with high spatial resolution allows us to detect and evaluate these relatively fine structures. Under physiologic conditions, MRI can be used to depict uterine and ovarian ligaments (ie, the uterosacral, cardinal, and round ligaments, as well as the suspensory ligament of the ovary). In the presence of pathologic conditions (inflammation, endometriosis, tumors), the suspensory ligaments may appear thickened or invaded, which makes their delineation easier. Understanding the normal anatomy of the suspensory ligaments of the female genital organs and using a standardized nomenclature are essential for identifying and reporting related pathologic conditions. The female pelvic anatomy and the suspensory ligaments of the female genital organs are described as depicted with MRI. Also, the compartmental anatomy of the female pelvis is explained, including the extraperitoneal pelvic spaces. Finally, a checklist is provided for structured reporting of the MRI findings in the female pelvis. Online supplemental material is available for this article. ©RSNA, 2018.
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Affiliation(s)
- Malwina Kaniewska
- From the Department of Radiology (M.K., R.A.K.) and the Institute of Gynecology (M.H.), Kantonsspital Baden, Baden, Switzerland; the Department of Diagnostic Imaging and Interventional Radiology, Pomeranian Medical University Clinical Hospital No. 1, Szczecin, Poland (P.G.); and the Institute of Anatomy, University of Zurich, Zurich, Switzerland (C.M.)
| | - Piotr Gołofit
- From the Department of Radiology (M.K., R.A.K.) and the Institute of Gynecology (M.H.), Kantonsspital Baden, Baden, Switzerland; the Department of Diagnostic Imaging and Interventional Radiology, Pomeranian Medical University Clinical Hospital No. 1, Szczecin, Poland (P.G.); and the Institute of Anatomy, University of Zurich, Zurich, Switzerland (C.M.)
| | - Martin Heubner
- From the Department of Radiology (M.K., R.A.K.) and the Institute of Gynecology (M.H.), Kantonsspital Baden, Baden, Switzerland; the Department of Diagnostic Imaging and Interventional Radiology, Pomeranian Medical University Clinical Hospital No. 1, Szczecin, Poland (P.G.); and the Institute of Anatomy, University of Zurich, Zurich, Switzerland (C.M.)
| | - Caroline Maake
- From the Department of Radiology (M.K., R.A.K.) and the Institute of Gynecology (M.H.), Kantonsspital Baden, Baden, Switzerland; the Department of Diagnostic Imaging and Interventional Radiology, Pomeranian Medical University Clinical Hospital No. 1, Szczecin, Poland (P.G.); and the Institute of Anatomy, University of Zurich, Zurich, Switzerland (C.M.)
| | - Rahel A Kubik-Huch
- From the Department of Radiology (M.K., R.A.K.) and the Institute of Gynecology (M.H.), Kantonsspital Baden, Baden, Switzerland; the Department of Diagnostic Imaging and Interventional Radiology, Pomeranian Medical University Clinical Hospital No. 1, Szczecin, Poland (P.G.); and the Institute of Anatomy, University of Zurich, Zurich, Switzerland (C.M.)
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Kastelein AW, Vos LM, de Jong KH, van Baal JO, Nieuwland R, van Noorden CJ, Roovers JPW, Lok CA. Embryology, anatomy, physiology and pathophysiology of the peritoneum and the peritoneal vasculature. Semin Cell Dev Biol 2019; 92:27-36. [DOI: 10.1016/j.semcdb.2018.09.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Revised: 08/29/2018] [Accepted: 09/18/2018] [Indexed: 01/25/2023]
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9
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Sigdel PR, Dhital P, Kulung Rai BD, Poudyal S, Luitel B, Sharma UK. Persistent Mullerian duct syndrome with transverse testicular ectopia: A case report. Urol Case Rep 2019; 25:100888. [PMID: 31080737 PMCID: PMC6503297 DOI: 10.1016/j.eucr.2019.100888] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 03/29/2019] [Accepted: 04/09/2019] [Indexed: 11/26/2022] Open
Abstract
Persistent Mullerian duct syndrome (PMDS) is a rare entity of internal male pseudohermaphroditism. Transverse testicular ectopia (TTE) is the condition in which one testis moves to the other side and both testes pass the same inguinal canal. The combination of PMDS with TTE is rarer. Here, we present a case a phenotype male with left inguinal hernia and right undescended testis. On exploration of left inguinal region, uterus like tissue with its tubal structures were found. Both testes were in same side, one in left inguinal region and the other in the left scrotum.
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Affiliation(s)
- Prem Raj Sigdel
- Department of Urology and Kidney Transplant, Institute of Medicine, TUTH, Kathmandu, Nepal
| | - Pawan Dhital
- Department of Urology and Kidney Transplant, Institute of Medicine, TUTH, Kathmandu, Nepal
| | | | - Sujeet Poudyal
- Department of Urology and Kidney Transplant, Institute of Medicine, TUTH, Kathmandu, Nepal
| | - Bhojraj Luitel
- Department of Urology and Kidney Transplant, Institute of Medicine, TUTH, Kathmandu, Nepal
| | - Uttam Kumar Sharma
- Department of Urology and Kidney Transplant, Institute of Medicine, TUTH, Kathmandu, Nepal
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Hutson JM, Lopez-Marambio FA. The possible role of AMH in shortening the gubernacular cord in testicular descent: A reappraisal of the evidence. J Pediatr Surg 2017; 52:1656-1660. [PMID: 28599968 DOI: 10.1016/j.jpedsurg.2017.05.021] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 04/12/2017] [Accepted: 05/19/2017] [Indexed: 11/19/2022]
Abstract
BACKGROUND/AIM Anti-Müllerian hormone (AMH), also called Müllerian inhibiting substance (MIS), is glycoprotein hormone secreted by the fetal Sertoli cells to regulate regression of the Müllerian ducts, the anlagen of the uterus, fallopian tubes, and upper vagina. After its existence was predicted in 1946 and its isolation and purification in the 1970's, a huge amount of information has been gathered on its molecular biology and function in the last 30-40years. Once thought to be a locally acting factor in the male fetus during sexual differentiation, it is now recognized as an endocrine hormone present in both sexes and with functions throughout life. One of the remaining controversies is the possible role of AMH during fetal testicular descent. In the human with aberrant AMH function, the boy has cryptorchidism with persistent Müllerian duct syndrome (PMDS), where the testes are often intraabdominal and on an abnormally long gubernacular cord. By contrast, in rodent models knockout of the AMH gene does not cause cryptorchidism. METHODS/RESULTS In this review we examined the evidence in the literature for and against a role for AMH in testicular descent and considered the implications of the different anatomy of the gubernacular cord in rodents versus children. CONCLUSION We conclude that AMH may have a role in shortening the gubernacular cord in humans which is concealed in rodent models by differences in anatomy of the gubernacular cord in rodents. The controversy could be resolved by re-examination of the gubernacular cord in boys with PMDS and mice with AMHKO. TYPE OF STUDY Review. LEVEL OF EVIDENCE V.
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Affiliation(s)
- John M Hutson
- Department of Paediatrics, University of Melbourne, Australia; Urology Department, The Royal Children's Hospital, Melbourne, Australia; F Douglas Stephens Surgical Research Group, Murdoch Childrens Research Institute, Melbourne, Australia.
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11
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van Baal J, Van de Vijver K, Nieuwland R, van Noorden C, van Driel W, Sturk A, Kenter G, Rikkert L, Lok C. The histophysiology and pathophysiology of the peritoneum. Tissue Cell 2017; 49:95-105. [DOI: 10.1016/j.tice.2016.11.004] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 11/11/2016] [Accepted: 11/11/2016] [Indexed: 12/14/2022]
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12
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Hutson JM, Nation T, Balic A, Southwell BR. The role of the gubernaculum in the descent and undescent of the testis. Ther Adv Urol 2011; 1:115-21. [PMID: 21789060 DOI: 10.1177/1756287209105266] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Testicular descent to the scrotum involves complex anatomical rearrangements and hormonal regulation. The gubernaculum remains the key structure, undergoing the 'swelling reaction' in the transabdominal phase, and actively migrating out of the abdominal wall to the scrotum in the inguinoscrotal phase. Insulin-like hormone 3 (Insl3) is the primary regulator of the first phase, possibly augmented by Müllerian inhibiting substance/anitmüllerian hormone (MIS/AMH), and regression of the cranial suspensory ligament by testosterone. The inguinoscrotal phase is controlled by androgens acting both directly on the gubernaculum and indirectly via the genitofemoral nerve, and release of calcitonin gene-related peptide from its sensory fibres. Outgrowth of the gubernaculum and elongation to the scrotum has many similarities to an embryonic limb bud.Cryptorchidism occurs because of both failure of migration congenitally, and failure of elongation of the spermatic cord postnatally. Germ cell development postnatally is disturbed in congenital cryptorchidism, but our current understanding of germ cell biology suggests that early orchidopexy, around 6 months of age, should provide a significant improvement in prognosis compared with a previous generation. Hormone treatment is not currently recommended. Acquired cryptorchid testes may need orchidopexy once they no longer reach the scrotum, although this remains controversial.
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Affiliation(s)
- John M Hutson
- Chair of Paediatric Surgery, Urology Department, Royal Children's Hospital, Parkville, Victoria, 3052 Australia Royal Children's Hospital, Melbourne, Australia Murdoch Children's Research Institute, Melbourne, Australia Department of Paediatrics, University of Melbourne, Australia
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Abstract
Cryptorchidism is a very common anomaly of the male genitalia, affecting 2%-4% of male infants and is more common in premature infants. There are two separate stages of testicular descent. The first stage occurs at 8-15 weeks' gestation in the human fetus and is characterized by enlargement of the genito-inguinal ligament, or gubernaculum, and regression of the cranial suspensory ligament. The testis remains close to the future inguinal region as the fetal abdomen grows. Leydig cells in the testis produce insulin-like hormone 3, which stimulates the caudal gubernaculum to grow and become thicker. Mullerian inhibiting substance may have a role in the first phase of descent by stimulating the swelling reaction in the gubernaculum. The second phase of testicular descent requires migration of the gubernaculum and testis from the inguinal region to the scrotum, between 25 and 35 weeks' gestation. The genitofemoral nerve releases calcitonin gene-related peptide, a neurotransmitter that provides a chemotactic gradient to guide migration. The exact cause of cyrptorchidism remains elusive. Information is mainly derived from animal studies (especially in rodents), which may not extrapolate to the human setting. These findings, however, do have some similarities among mammalian species. The current recommended timing for orchidopexy is between 6 and 12 months of life in an effort to preserve the spermatogonia--the stem cells for subsequent spermatogenesis. Despite surgical treatment by orchidopexy, the long-term outcome still remains problematic and controversial. Impaired fertility (33% in unilateral cases and 66% in bilateral undescended testes) and a cancer risk 5-10 times greater than normal is observed over time. Further research into the cause and management of undescended testes is necessary.
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Affiliation(s)
- John M Hutson
- Department of Paediatrics, University of Melbourne, Melbourne, Victoria, Australia.
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Demir H, Scoccia B. Internal Herniation of Adnexa Through a Defect of the Broad Ligament: Case Report and Literature Review. J Minim Invasive Gynecol 2010; 17:110-2. [DOI: 10.1016/j.jmig.2009.10.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2009] [Revised: 09/26/2009] [Accepted: 10/01/2009] [Indexed: 02/06/2023]
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Wuerstle M, Lesser T, Hurwitz R, Applebaum H, Lee SL. Persistent mullerian duct syndrome and transverse testicular ectopia: embryology, presentation, and management. J Pediatr Surg 2007; 42:2116-9. [PMID: 18082721 DOI: 10.1016/j.jpedsurg.2007.09.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND The finding of persistent mullerian duct syndrome (PMDS) with transverse testicular ectopia (TTE) is rare. We present nonidentical triplets with PMDS with TTE. CASES Triplet A presented with a right inguinal hernia and left nonpalpable testis at 4 months of age. Ultrasound demonstrated 1 testis in the right hemiscrotum. Laparoscopy revealed both testes in the right inguinal canal with a thick midline structure. Triplet B presented at 6 months of age in the exact manner with similar intraoperative findings as triplet A. No additional mullerian structures were identified in triplets A and B. Both underwent laparoscopic left orchiopexy and open right inguinal herniorraphy/orchiopexy. A portion of vas was noted in the path specimen of triplet B. Triplet C presented at 7 months of age with a nonpalpable left testis. Laparoscopy demonstrated bilateral fallopian tubes and a midline uterine remnant. Open bilateral orchiopexy was performed, and bilateral biopsies confirmed testes. All 3 were 46-X,Y. CONCLUSION Persistent mullerian duct syndrome with TTE may be encountered when performing laparoscopy for patients with nonpalpable testis. The persistent mullerian remnants vary among individuals and alter the normal anatomy, thus may complicate diagnosis and surgical management.
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Affiliation(s)
- Melanie Wuerstle
- Division of Pediatric Surgery and Department of Urology, Kaiser Permanente, Los Angeles Medical Center, Los Angeles, CA 90027, USA
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Arango NA, Szotek PP, Manganaro TF, Oliva E, Donahoe PK, Teixeira J. Conditional deletion of beta-catenin in the mesenchyme of the developing mouse uterus results in a switch to adipogenesis in the myometrium. Dev Biol 2005; 288:276-83. [PMID: 16256976 DOI: 10.1016/j.ydbio.2005.09.045] [Citation(s) in RCA: 164] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2005] [Revised: 09/28/2005] [Accepted: 09/30/2005] [Indexed: 11/21/2022]
Abstract
Precise cell fate decisions during differentiation of uterine tissues from the embryonic Müllerian duct are critical for normal fertility. Wnt-7a, a member of the Wnt family of secreted signaling molecules that can signal through a canonical beta-catenin pathway, is necessary for the correct differentiation of both anterior/posterior and radial axes of the uterus. In order to investigate the role of beta-catenin directly in mouse uterine development, we have generated mice that are deficient in beta-catenin expression in the embryonic Müllerian duct. We have found that conditional deletion of beta-catenin in the Müllerian duct mesenchyme before postnatal differentiation of the uterine layers results in a phenotype that is distinct from the phenotype observed by deletion of Wnt-7a. Shortly after birth, the uteri of the conditional mutants appear smaller and less organized. The uteri of adult conditional beta-catenin mutants are grossly deficient in smooth muscle of the myometrium, which has been replaced by adipose, a phenotype resembling human lipoleiomyoma. We also show that the adipocytes in the uteri of mice conditionally deleted for beta-catenin are derived from Müllerian inhibiting substance type II receptor-expressing cells suggesting that they share a common origin with the uterine smooth muscle cells. These results describe the first molecular evidence linking disruption of beta-catenin expression in mesenchymal cells with a switch from myogenesis to adipogenesis in vivo.
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Affiliation(s)
- Nelson A Arango
- Pediatric Surgical Research Laboratories/CPZN6202, Massachusetts General Hospital and Harvard Medical School, 185 Cambridge St., Boston, MA 02114, USA
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