Video Experimental Relacionado
Updated: Sep 9, 2025

10:41
Germ Cell Transplantation and Testis Tissue Xenografting in Mice
Published on: February 6, 2012
29.9K
[Seminoma de testículo no descendido en un paciente con falso hermafroditismo]
A D Tsaregorodtseva1, Yu A Tikhonova2, A A Shishkina2
1Dzhanelidze St. Petersburg Research Institute of Emergency Care, St. Petersburg, Russia.
Arkhiv patologii
|September 3, 2025
Resumen
El síndrome del conducto de Müllerian persistente (PMDS) es un trastorno raro del desarrollo sexual. Este caso destaca el PMDS en un hombre de 33 años con criptorquidia, neoplasia testicular y falso hermafroditismo.
Área de la Ciencia:
- Endocrinología
- La genética
- Patología
Sus antecedentes:
- Los trastornos del desarrollo sexual (DSD) abarcan afecciones con discrepancias en el sexo genético, gonadal y fenotípico.
- El síndrome del conducto de Müllerian persistente (PMDS) es una forma rara del pseudohermaphroditism masculino, caracterizado por el cryptorchidism y la presencia de órganos reproductivos internos femeninos en 46, individuos XY.
- Aproximadamente 200 casos de PMDS han sido documentados en todo el mundo en las últimas cinco décadas.
Objetivo del estudio:
- Para presentar un caso único de síndrome de conducto Müllerian Persistente (PMDS) en un hombre de 33 años.
- Detallar los resultados del diagnóstico, incluidos los análisis macroscópicos, microscópicos, inmunohistoquímicos y genéticos moleculares.
- Informar de la co-ocurrencia de PMDS con neoplasia testicular (seminoma) y hermafroditismo falso.
Principales métodos:
- Informe de caso detallando la presentación clínica y los hallazgos quirúrgicos.
- Examen macroscópico y microscópico de muestras quirúrgicas.
- Coloración inmunohistoquímica para analizar las características del tejido.
- Estudios genéticos moleculares para investigar los factores genéticos subyacentes.
Principales resultados:
- Un paciente de 33 años presentó criptorquidia bilateral y una neoplasia testicular.
- El examen quirúrgico reveló la presencia de órganos reproductores internos femeninos, consistentes con el síndrome de conducto Müllerian persistente (PMDS).
- El paciente fue diagnosticado con seminoma típico del testículo derecho no descendido (pT2) y falso hermafroditismo.
Conclusiones:
- Este caso subraya la importancia de una evaluación exhaustiva en pacientes con trastornos del desarrollo sexual.
- La co-presentación del síndrome del conducto de Müllerian Persistente (PMDS) con la neoplasia testicular pone de relieve asociaciones potenciales y desafíos de diagnóstico.
- El análisis histopatológico y genético molecular integral es crucial para el diagnóstico y el manejo precisos de casos complejos de DSD.
Videos de Conceptos Relacionados
Development of the Sexual Organs in the Embryo and Fetus
1.4K
Development of the reproductive organs in an embryo starts from a bipotential state. This means the early embryo can develop either male or female reproductive organs. The formation of these organs begins with the growth of gonadal ridges that arise from the intermediate mesoderm during the fifth week of development.
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the...
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the...
1.4K
Testes: Histology
1.5K
A tough, fibrous membrane, the tunica albuginea, covers the testes, extending inward to form fibrous partitions or septa, dividing them into internal compartments called lobules. Each lobule has 1 to 3 tightly coiled seminiferous tubules where sperm production occurs. These tubules merge into a tubular network at the back of the testis, known as the rete testis. It connects to 15 to 20 efferent ductules, leading to the epididymis.
The spermatogenic cells, responsible for producing sperm, are...
The spermatogenic cells, responsible for producing sperm, are...
1.5K
Testes: Gross Anatomy
3.0K
The testes, also known as testicles, are the male gonads. They are housed within the scrotum, a sac-like structure located beneath the penis. The scrotum's primary role is to regulate the temperature of the testes, which is crucial for sperm production.
Each testis is surrounded by the tunica albuginea, a dense connective tissue layer that provides structural support and protection. This layer is covered by an outer serous membrane called the tunica vaginalis, which helps reduce friction...
Each testis is surrounded by the tunica albuginea, a dense connective tissue layer that provides structural support and protection. This layer is covered by an outer serous membrane called the tunica vaginalis, which helps reduce friction...
3.0K
Spermatogenesis
103.3K
Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male...
103.3K
The Y Chromosome Determines Maleness
6.8K
The Y chromosome is a sex chromosome found in several vertebrates and mammals, including humans. In addition to 22 pairs of autosomes, the human males have one X chromosome and one Y chromosome. In these organisms, the presence or absence of the Y chromosome determines the development of male traits.
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size....
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size....
6.8K
Sperm Transport
1.4K
The journey of sperm from its origin to the point of ejaculation begins within the seminiferous tubules of the testis. Here, Sertoli cells produce fluid that propels non-motile sperm through a series of conduits, starting with the straight tubules leading to the rete testis. This interconnected network of tubules acts as the initial pathway for sperm, guiding them into the efferent ductules and then into the epididymis for maturation.
The maturation phase occurs in the epididymis, where sperm...
The maturation phase occurs in the epididymis, where sperm...
1.4K

