1
|
Kim JH, Jin ZW, Abe H, Murakami G, Rodríguez-Vázquez JF, Hinata N. Distal vaginal atresia: a report of a rare type found a late-term fetus and its histological comparison with the normal pelvis. Anat Cell Biol 2022; 55:475-482. [PMID: 36071545 PMCID: PMC9747340 DOI: 10.5115/acb.22.082] [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] [Received: 04/12/2022] [Revised: 05/24/2022] [Accepted: 07/05/2022] [Indexed: 01/02/2023] Open
Abstract
Solitary distal vaginal atresia is generally caused by a transverse septum or an imperforate hymen. We found a novel type of distal vaginal atresia in a late-term fetus (gestational age approximately 28 weeks) in our histology collection. This fetus had a vaginal vestibule that was closed and covered by a thick subcutaneous tissue beneath the perineal skin in the immediately inferior or superficial side of the imperforate hymen. The uterus, uterine tube, anus, and anal canal had normal development. The urethral rhabdosphincters were well-developed and had a normal topographical relationship with the vagina, but the urethrovaginal sphincter was absent. Thus, vaginal descent seemed to occur normally and form the vestibule. However, the external orifice of the urethra consisted of a highly folded duct with hypertrophied squamous epithelium. Notably, the corpus cavernosum and crus of the clitoris had poor development and were embedded in the subcutaneous tissue, distant from the vestibule. Normally, the cloacal membrane shifts from the bottom of the urogenital sinus to the inferior aspect of the thick and elongated genital tubercle after establishment of the urorectal septum. Therefore, we speculate there was a failure in the transposition of the cloacal membrane caused by decreased elongation of the genital tubercle. The histology of this anomaly strongly suggested that the hymen does not represent a part of the cloacal membrane, but is instead a product that appears during the late recanalization of the distal vagina after vaginal descent. The transverse septum was also likely to form during this recanalization.
Collapse
Affiliation(s)
- Ji Hyun Kim
- Department of Anatomy, Jeonbuk National University Medical School, Jeonju, Korea,Corresponding author: Ji Hyun Kim, Department of Anatomy, Jeonbuk National University Medical School, 20 Geonji-ro, Deokjin-gu, Jeonju 54907, Korea, E-mail:
| | - Zhe-Wu Jin
- Department of Anatomy, Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu, China
| | - Hiroshi Abe
- Emeritus professor of Akita University, Akita, Japan
| | - Gen Murakami
- Division of Internal Medicine, Cupid Clinic, Iwamizawa, Japan
| | | | - Nobuyuki Hinata
- Department of Urology, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan
| |
Collapse
|
2
|
Kim JH, Hayashi S, Jin ZW, Murakami G, Rodríguez-Vázquez JF. Umbilical cord vessels other than the umbilical arteries and vein: a histological study of midterm human fetuses. Anat Cell Biol 2022; 55:467-474. [PMID: 36258268 PMCID: PMC9747333 DOI: 10.5115/acb.22.102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/08/2022] [Accepted: 06/08/2022] [Indexed: 01/02/2023] Open
Abstract
At birth, the umbilical cord contains various types of thin vessels that are near and outside the umbilicus and separate from the umbilical arteries and vein. These vessels are regarded as the remnant "vitelline vessels" and are often called "umbilical vessels", although this terminology could lead to confusion with the true umbilical arteries and vein. No study has yet comprehensively examined these vessels using histological sections. Our examination of these vessels in 25 midterm fetuses (gestational age: 10-16 weeks) led to five major findings: (i) all specimens had umbilical branches of the inferior epigastric artery; (ii) 5 specimens had vitelline vein remnants; (iii) 4 specimens had a thin artery originating from the left hepatic artery that ran along the umbilical vein; (iv) 2 specimens had a so-called "para-umbilical vein" that was along the umbilical vein and reached the umbilicus; and (v) all specimens had lymphatic vessels originating from the umbilicus that ran caudally along the umbilical artery. The pelvic vein tributaries were well developed along the intra-abdominal umbilical artery, but did not reach the umbilicus. The lymphatic vessel was distinguished from the veins by an intraluminar cluster of lymphocytes attaching to the endothelium. The arterial branch in the umbilical cord did not accompany veins and lymphatic vessels, in contrast to the mother artery in the rectus abdominis. All these thin vessels seemed to be obliterated when the fibrous umbilical ring grew during late-term. The para-umbilical collateral vein in adults might develop outside the fibrous umbilical ring after birth.
Collapse
Affiliation(s)
- Ji Hyun Kim
- Department of Anatomy, Jeonbuk National University Medical School, Jeonju, Korea,Corresponding author: Ji Hyun Kim, Department of Anatomy, Jeonbuk National University Medical School, Jeonju 54907, Korea, E-mail:
| | - Shogo Hayashi
- Department of Anatomy, Division of Basic Medicine, Tokai University School of Medicine, Isehara, Japan
| | - Zhe Wu Jin
- Department of Anatomy, Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu, China
| | - Gen Murakami
- Division of Internal Medicine, Cupid Clinic, Iwamizawa, Japan
| | | |
Collapse
|
3
|
Savoldi IR, Ibelli AMG, Cantão ME, Peixoto JDO, Pires MP, Mores MAZ, Lagos EB, Lopes JS, Zanella R, Ledur MC. A joint analysis using exome and transcriptome data identifiescandidate polymorphisms and genes involved with umbilical hernia in pigs. BMC Genomics 2021; 22:818. [PMID: 34773987 PMCID: PMC8590244 DOI: 10.1186/s12864-021-08138-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 10/29/2021] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND Umbilical Hernia (UH) is characterized by the passage of part of the intestine through the umbilical canal forming the herniary sac. There are several potential causes that can lead to the umbilical hernia such as bacterial infections, management conditions and genetic factors. Since the genetic components involved with UH are poorly understood, this study aimed to identify polymorphisms and genes associated with the manifestation of umbilical hernia in pigs using exome and transcriptome sequencing in a case and control design. RESULTS In the exome sequencing, 119 variants located in 58 genes were identified differing between normal and UH-affected pigs, and in the umbilical ring transcriptome, 46 variants were identified, located in 27 genes. Comparing the two methodologies, we obtained 34 concordant variants between the exome and transcriptome analyses, which were located in 17 genes, distributed in 64 biological processes (BP). Among the BP involved with UH it is possible to highlight cell adhesion, cell junction regulation, embryonic morphogenesis, ion transport, muscle contraction, within others. CONCLUSIONS We have generated the first exome sequencing related to normal and umbilical hernia-affected pigs, which allowed us to identify several variants possibly involved with this disorder. Many of those variants present in the DNA were confirmed with the RNA-Seq results. The combination of both exome and transcriptome sequencing approaches allowed us to better understand the complex molecular mechanisms underlying UH in pigs and possibly in other mammals, including humans. Some variants found in genes and other regulatory regions are highlighted as strong candidates to the development of UH in pigs and should be further investigated.
Collapse
Affiliation(s)
- Igor Ricardo Savoldi
- Programa de Pós-Graduação em Zootecnia, Universidade do Estado de Santa Catarina, UDESC-Oeste, Chapecó, SC 89815-630 Brazil
| | - Adriana Mércia Guaratini Ibelli
- Embrapa Suínos e Aves, 321, Concórdia, SC 89715-899 Brazil
- Programa de Pós-Graduação em Ciências Veterinárias, Universidade Estadual do Centro-Oeste, Guarapuava, PR 85040-167 Brazil
| | | | - Jane de Oliveira Peixoto
- Embrapa Suínos e Aves, 321, Concórdia, SC 89715-899 Brazil
- Programa de Pós-Graduação em Ciências Veterinárias, Universidade Estadual do Centro-Oeste, Guarapuava, PR 85040-167 Brazil
| | - Michele Porto Pires
- Instituto Catarinense de Sanidade Agropecuária, Florianópolis, SC 88034001 Brazil
| | | | - Essamai Brizola Lagos
- Programa de Pós-Graduação em Zootecnia, Universidade Estadual de Ponta Grossa, Ponta Grossa, PR Brazil 84030-900
| | | | - Ricardo Zanella
- Universidade de Passo Fundo, Passo Fundo, RS 99052-900 Brazil
- Programa de Mestrado em BioExperimentação, Universidade de Passo Fundo, Passo Fundo, RS 99052-900 Brazil
| | - Mônica Corrêa Ledur
- Programa de Pós-Graduação em Zootecnia, Universidade do Estado de Santa Catarina, UDESC-Oeste, Chapecó, SC 89815-630 Brazil
- Embrapa Suínos e Aves, 321, Concórdia, SC 89715-899 Brazil
| |
Collapse
|
4
|
Sato T, Kim JH, Cho KH, Hayashi S, Rodríguez-Vázquez JF, Murakami G. Fetal development and growth of the human erector spinae with special reference to attachments on the surface aponeurosis. Surg Radiol Anat 2021; 43:1503-1517. [PMID: 34059927 DOI: 10.1007/s00276-021-02759-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Accepted: 04/22/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE The longissimus (LO) and iliocostalis (IC) of adults consist of myofibers extending from the superolateral to the inferomedial side of the back and, because of the same course, they are fused in the thoracolumbar region. The LO also has a medial attachment to the long myofibers of the transversospinalis (TS) showing a course from the superomedial to the inferolateral side. However, there is apparently no information regarding when and how these similar longitudinal muscles differentiate from a cluster of dorsomedial myotome cells. METHODS We examined sagittal and horizontal sections of the trunks of 39 human embryos and fetuses (18-330 mm crown-rump length). RESULTS At 6-7 weeks gestational age (GA), the surface aponeurosis appeared prior to and independent of the thoracolumbar fascia. At 6-9 weeks GA, the LO myofibers had a postero-inferior course, from the transverse process to the initial aponeurosis, whereas the TS myofibers had a postero-superior course, from a lateral extension of the intertransverse ligament to the aponeurosis. However, the IC consisted of supracostal longitudinal myofibers and was distant from the LO until 12 weeks GA. Because of the lack of ligamentous attachments and ribs, myofibers of the TS, LO, and IC took a similar inferior course in the lumbar region. When the early TS was represented by the transverso-aponeurotic muscle, consequently, the LO corresponded to the aponeuro-transversal muscle and was independent from the IC. CONCLUSION The classical model of TS and LO development does not recognize the essential role of the aponeurosis identified here.
Collapse
Affiliation(s)
- Tatsuo Sato
- Emeritus Professor of Tokyo Medical and Dental University, Tokyo, Japan
| | - Ji Hyun Kim
- Department of Anatomy, Jeonbuk National University Medical School, Geunji-ro 20, Deokjin-gu, Jeonju, Jeonbuk, 54907, Republic of Korea.
| | - Kwang Ho Cho
- Department of Neurology, Wonkwang University School of Medicine and Hospital, Institute of Wonkwang Medical Science, Iksan, Korea
| | - Shogo Hayashi
- Department of Anatomy, School of Medicine, International University of Health and Welfare, Narita, Japan
| | | | - Gen Murakami
- Division of Internal Medicine, Cupid Clinic, Iwamizawa, Hokkaido, Japan
| |
Collapse
|
5
|
Fetal development of the thoracolumbar fascia with special reference to the fascial connection with the transversus abdominis, latissimus dorsi, and serratus posterior inferior muscles. Surg Radiol Anat 2021; 43:917-928. [PMID: 33438110 DOI: 10.1007/s00276-020-02668-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 12/24/2020] [Indexed: 10/22/2022]
Abstract
PURPOSE The three-layered thoracolumbar fascia (TLF) encapsulates the erector spinae and the quadratus lumborum and has been a major concern for physical therapists. However, knowledge of its prenatal development and growth is limited. METHODS Histological examination of 25 embryos and fetuses at 6-37 weeks (CRLs, 15-310 mm). RESULTS At the posterior end, the abdominal muscles continued toward an initial posterior layer of the TLF (pTLF) at 6 weeks, but the connection became narrow and limited to the obliquus externus aponeurosis until near term. The middle layer of the TLF (mTLF) appeared as a posterior continuation of the transversalis fascia at 9 weeks and, depending on a mechanical demand for the vertebral column extension near term, it grew as a thick intermuscular septum between the iliocostalis and quadratus lumborum. Thus, the mTLF lateral end changed from the abdominal wall to the back or pTLF. The serratus posterior inferior originated from the pTLF after 9 weeks, but a connection of the latissimus dorsi with the fascia was established much later. Near term, the gluteus maximus was attached to an aponeurosis covering the multifidus behind the sacrum. Therefore, the pTLF extended to cover the gluteal muscles. CONCLUSION We rejected the hypothesis that the mTLF develops as a marginal tissue between the primitive epaxial and hypaxial muscles. This study seemed to be the first report showing a fact that, within prenatal life, a drastic change is likely to occur in interfascial connections and their topographical relation to muscles; the TLF might be the best sample.
Collapse
|
6
|
Investigation of a connection between abdominal wall defects and severity of the herniation in fetuses with gastroschisis and omphalocele. Sci Rep 2021; 11:27. [PMID: 33420099 PMCID: PMC7794425 DOI: 10.1038/s41598-020-79599-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 12/09/2020] [Indexed: 11/29/2022] Open
Abstract
Analyze the biometric parameters and the size (area) of abdominal wall defect (AWD) in fetuses with gastroschisis and omphaloceles and correlate them with the herniated internal organs. We studied 22 fetuses (11 with AWDs and 11 without anomalies). In all fetuses we evaluated the xiphopubic distance (XPD) and iliac crest distance (ICD). In fetuses with AWDs we dissected the abdominal wall and measured the width and length of the defect for calculating its area and studying the correlation between the size of the defect with the organs that were herniated. For statistical analysis, the Anova and Tukey post-test were used (p < 0.05). The XPD in the control group had mean of 4.2 mm (2.3–5.9; SD ± 1.11), while in the AWDs it was 4.2 mm (2.9–5.5; SD ± 0.98) (p = 0.4366). The ICD had mean values of 2.5 mm (1.6–3.4; SD ± 0.58) in the control group, and 2.3 mm (1.2–3.0; SD ± 0.56) in AWDs fetuses (p = 0.6963). The number of herniate organs do not have significant correlation with the area of the defect (r2 = 0.2504, p = 0.5068). There is no correlation between the size (area) of abdominal wall defects and the number of the internal organs that herniated. Therefore, the hole size is not a predictor of the severity of the gastroschisis or omphalocele.
Collapse
|