Müllerian duct regression in a marsupial, the tammar wallaby

1997 ◽  
Vol 196 (1) ◽  
pp. 39-46 ◽  
Author(s):  
D. J. Whitworth ◽  
Geoffrey Shaw ◽  
M. B. Renfree
Keyword(s):  
Tammar Wallaby ◽  
Mullerian Duct ◽  
Müllerian Duct

Influence of the immature testis on sexual differentiation in the tammar wallaby, Macropus eugenii (Macropodidae: Marsupialia)

1989 ◽  
Vol 1 (3) ◽  
pp. 243 ◽  
Author(s):  
CH Tyndale-Biscoe ◽  
LA Hinds
Keyword(s):  
Sex Chromosome ◽  
Tammar Wallaby ◽  
Mammary Glands ◽  
Compensatory Hypertrophy ◽  
The Body ◽  
Mullerian Duct ◽  
Müllerian Duct ◽  
Erectile Tissue ◽  
Macropus Eugenii ◽  
Genetical Control

Reproduction in the tammar wallaby, Macropus eugenii (Desmarest), is highly seasonal in the females but not the males. This study was designed to determine whether the difference is established during early life as a result of exposure to the developing testes. At day 10 after birth, when the sex can be distinguished externally, testes were removed from males and placed under the flank skin of females, while other groups of males and females were subjected to surgery without interfering with the gonads. The testis grafts remained palpable for 3-6 months. Sex-chromosome constitution was confirmed by karyotyping. At 3 years of age, the body weights and dimensions of the grafted females were not significantly different from those of the sham-operated females, whereas those of the castrated males were significantly larger and were equal to those of the sham-operated males, indicating that there is genetical control of growth independent of the testis in this species of marsupial. During 5 years of observations, none of the grafted females ever produced young, whereas all of the sham-operated females produced young each year from the second year. The grafted females had a mixture of male and female reproductive structures. The pouch and mammary glands developed normally, as did the Mullerian duct derivatives, the vaginal complex, the uteri and the oviducts. The ovaries were either devoid of oocytes and follicles or had reduced numbers, the Wolffian ducts were retained to varying degrees, the urogenital strand had developed into a prostate indistinguishable in size and structure from that of intact males, and the genital tubercle had developed into a normal-sized penis with a crus penis and Cowper's glands. In the castrated males, the scrotum developed normally and contained the gubernaculum and vas deferens. There was no evidence of Mullerian duct derivatives, and the urogenital strand was a simple canal, as in females. There were no Cowper's glands and no penis or erectile tissue. In one hemicastrated male, there was no development of the penis, although the remaining testis occupied the scrotum and showed compensatory hypertrophy. These findings indicate that the testis, at day 10, has a profound influence on the early differentiation of the Wolffian ducts, prostate and penis but cannot influence the differentiation of the Mullerian duct derivatives. The testis does not have any effect on the development of the pouch, mammary glands or scrotum or on somatic growth, all of which are apparently under independent genetical control.

Epididymal Cyst - A Case Study

2018 ◽  
Vol 3 (4) ◽  
Author(s):  
Dr. Vinayak A. Mali ◽  
Dr.Prashanth K.
Keyword(s):  
Local Anaesthesia ◽  
Marked Improvement ◽  
Wolffian Duct ◽  
Cystic Degeneration ◽  
Mullerian Duct ◽  
Duct System ◽  
Middle Aged ◽  
Müllerian Duct ◽  
Mesonephric Duct

Cysts of the epididymis are usually congenital and derived from an embryonic remnant. These cysts are due to cystic degeneration of remnants of the paramesonephric or Mullerian duct and Remnants of the mesonephric duct or Wolffian duct system. Here we report a case of bilateral Epididymal cysts in a middle aged man with a complaint of scrotal lump and infertility since 15 years. He was treated with excision of the cysts under local anaesthesia and had a marked improvement in scrotal discomfort and urgency of micturition after the treatment.

Atypical Clinical Presentation of Persistent Müllerian Duct Syndrome in Siblings

2021 ◽  
pp. 1-6
Author(s):  
Evgenia Globa ◽  
Nataliya Zelinska ◽  
Nina Siryk ◽  
Anu Bashamboo ◽  
Kenneth McElreavey
Keyword(s):  
Genetic Diagnosis ◽  
Autosomal Recessive Disorder ◽  
Normal Male ◽  
Compound Heterozygous ◽  
Mullerian Duct ◽  
Müllerian Duct ◽  
Persistent Müllerian Duct Syndrome ◽  
Persistent Mullerian Duct Syndrome ◽  
Bilateral Cryptorchidism ◽  
Duct Syndrome

Persistent Müllerian duct syndrome (PMDS) is a rare autosomal recessive disorder characterized by the lack of regression of the derivatives of the Müllerian ducts in males. Boys with this condition usually present with unilateral or bilateral cryptorchidism, inguinal hernias, and reproductive disorders with normal male genitalia. Variants in the AMH or AMHR2 genes are responsible for the development of this syndrome. The genetic diagnosis and surgery in PMDS is challenging for both the endocrinologist and the urologist. Here, we describe the management of 2 siblings from 1 family who presented with bilateral cryptorchidism and hypospadias at birth. One child had testis located in the pelvis in the position of normal ovaries, while the other child had testis which were located in the inguinal canals (bilateral inguinal cryptorchidism). Exome sequencing revealed a compound heterozygous variant in the AMHR2 gene c.1388G>A, p.R463H and c.1412G>A p.R471H. To our knowledge, hypospadias has not been described in association with PMDS.

An unusual case of undescended testis: type II persistent Müllerian duct syndrome

Pathology ◽  
2019 ◽  
Vol 51 (3) ◽  
pp. 335-336
Author(s):  
Wai Chee Lo ◽  
Kwok Leung Ng ◽  
Kam Chi Teresa Tsui ◽  
Wai Yan Candy Ng ◽  
Yuet Ping Liz Yuen
Keyword(s):  
Unusual Case ◽  
Undescended Testis ◽  
Mullerian Duct ◽  
Type Ii ◽  
Müllerian Duct ◽  
Persistent Müllerian Duct Syndrome ◽  
Persistent Mullerian Duct Syndrome ◽  
Duct Syndrome

A Unilateral Functioning Uterine Anlage with Müllerian Duct Agenesis

1980 ◽  
Vol 18 (2) ◽  
pp. 99-101 ◽  
Author(s):  
John A. Rock ◽  
Theodore A. Baramki ◽  
Tim H. Parmley ◽  
Howard W. Jones
Keyword(s):  
Mullerian Duct ◽  
Müllerian Duct
Sign in / Sign up

Export Citation Format

Share Document