Related Experiment Video
Updated: Jun 6, 2026
09:41
Functional Assessment of Kinesin-7 CENP-E in Spermatocytes Using In Vivo Inhibition, Immunofluorescence and Flow Cytometry
Published on: December 28, 2021
[Stage 1 testicular seminoma].
E Gross1, C Champetier, Y Pointreau
1Département de radiothérapie, hôpital de la Timone, 264, rue Saint-Pierre, 13005 Marseille, France. manugross@free.fr
Summary
Adjuvant radiotherapy after testicular cancer surgery significantly reduces relapse risk. This treatment offers high survival rates but requires careful consideration of long-term side effects like infertility and secondary cancers.
Area of Science:
- Oncology
- Radiation Oncology
- Medical Physics
Background:
- Testicular cancer is the most common malignancy in men aged 15-35, though rare overall (1% of cancers).
- Adjuvant radiotherapy following orchidectomy is a standard treatment for Stage I testicular seminoma.
- The goal is to eliminate subclinical metastatic disease in regional lymph nodes.
Purpose of the Study:
- To evaluate the efficacy and toxicity of adjuvant radiotherapy in Stage I testicular seminoma.
- To analyze relapse-free and overall survival rates associated with this treatment modality.
- To discuss long-term risks, including infertility and secondary malignancies.
Main Methods:
- Adjuvant radiotherapy targets paraaortic lymph nodes, potentially including the ipsilateral renal hilum.
- Standard fractionation involves 20 Gy in 10 fractions over 2 weeks, typically using anteroposterior beams.
- Patient outcomes and toxicities were assessed post-treatment.
Main Results:
- Relapse-free survival is 96% and overall survival is 98% at 5 years with adjuvant radiotherapy.
- Acute toxicities like nausea and diarrhea are generally transient.
- Long-term considerations include potential infertility and a small risk of secondary cancers.
Conclusions:
- Adjuvant radiotherapy is highly effective in preventing relapse for Stage I testicular seminoma.
- Semen preservation should be discussed pre-treatment due to infertility risks.
- Ongoing advancements in radiotherapy techniques may further mitigate long-term risks.
Related Concept Videos
01:27Testes: Histology
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...
01:19Testes: Gross Anatomy
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...
01:41Spermatogenesis
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 reproductive...
01:22Spermatogenesis
Spermatogenesis is a complex process that involves the development of sperm cells from undifferentiated stem cells in the seminiferous tubules of the testes. The process is essential for the production of mature and functional sperm cells that are capable of fertilizing an egg.
The process of spermatogenesis can be divided into mitosis, meiosis, and spermiogenesis. During mitosis, the spermatogonia or stem cells divide to produce two identical daughter cells, type A and B spermatogonia. Type-A...
The process of spermatogenesis can be divided into mitosis, meiosis, and spermiogenesis. During mitosis, the spermatogonia or stem cells divide to produce two identical daughter cells, type A and B spermatogonia. Type-A...
01:20Disorders of the Male Reproductive System
Men's health issues are increasingly recognized as significant, with several conditions posing common threats. Among these, testicular cancer is especially prevalent in younger men, particularly those aged 20 to 35 years. The disease often manifests as a painless mass in the testicles, sometimes accompanied by a sensation of heaviness or a dull ache.
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra. Symptoms...
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra. Symptoms...
01:15Sperm Transport
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...