A rare form of persistent Mullerian duct syndrome: Transverse testicular ectopia with germ cell testis cancer and hernia uteri inguinalis

Andrologia ◽  
2021 ◽  
Author(s):  
Selim Yazar ◽  
Hüseyin Eren ◽  
Türker Acehan ◽  
Recep Bedir ◽  
Hasan Gündoğdu ◽  
...  
Keyword(s):  
Germ Cell ◽  
Testis Cancer ◽  
Mullerian Duct ◽  
Rare Form ◽  
Müllerian Duct ◽  
Transverse Testicular Ectopia ◽  
Persistent Müllerian Duct Syndrome ◽  
Persistent Mullerian Duct Syndrome ◽  
Testicular Ectopia ◽  
Duct Syndrome

scholarly journals Genetic and histopathological analysis of transverse testicular ectopia without persistent Müllerian duct syndrome: two case reports

2020 ◽  
Vol 14 (1) ◽  
Author(s):  
Takashi Nagai ◽  
Kentaro Mizuno ◽  
Masayuki Usami ◽  
Hidenori Nishio ◽  
Taiki Kato ◽  
...  
Keyword(s):  
Placental Alkaline Phosphatase ◽  
Mullerian Duct ◽  
Müllerian Duct ◽  
Transverse Testicular Ectopia ◽  
Persistent Müllerian Duct Syndrome ◽  
Persistent Mullerian Duct Syndrome ◽  
Relaxin Family ◽  
Variant Analysis ◽  
Testicular Ectopia ◽  
Duct Syndrome

Abstract Background Transverse testicular ectopia (TTE) is a rare anomaly in which both testes descend through a single inguinal canal into the same hemiscrotum. Although almost 20–50% of patients with TTE exhibit persistent Müllerian duct syndrome (PMDS) and many genetic analyses have been performed, no reports have described the genes contributing to TTE without PMDS. Here, we report two cases of TTE without PMDS using immunohistochemical staining and genetic analysis. Case presentation Two Asian patients with TTE without PMDS were subjected to orchiopexy. We performed testicular biopsies during operation and obtained blood samples before the operation. Testicular tissues were stained for c-kit, placental alkaline phosphatase (PLAP), and undifferentiated embryonic cell transcription factor 1 (UTF1) to evaluate the presence of intratubular malignant germ cells. Additionally, we performed polymerase chain reaction-based direct sequencing to identify single nucleotide polymorphisms in genes associated with regression of the Müllerian duct and testicular descent (that is, anti-Müllerian hormone [AMH], AMH receptor 2 [AMHR2], insulin-like 3 [INSL3], and relaxin family peptide receptor 2 [RXFP2]). The three-dimensional structures of proteins were predicted using SWISS-MODEL. In immunohistochemical analysis, c-kit and UTF1 were positive, whereas PLAP was negative in three testicular tissue samples from the two patients. These features were also detected on the unaffected side. In variant analysis, common missense variants in the AMH gene (g.365G>T; c.165G>T; p.Ser49Ile [rs10407022]) were observed. All variants in INSL3 and RXFP2 genes were intronic or silent. Conclusions Because UTF1, a specific marker of spermatogonial stem cell activity, was expressed in both the affected and unaffected sides in the testicular tissues of two patients, the risk of malignancy may be high in these patients. Although the etiology of TTE without PMDS remains unclear, our variant analysis results were consistent with previous reports, and variants in the AMH gene (rs10407022) may contribute to the specific phenotype of TTE without PMDS.

Sign in / Sign up

Export Citation Format

Share Document