Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Testes: Histology01:27

Testes: Histology

3.6K
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...
3.6K
Testes: Gross Anatomy01:19

Testes: Gross Anatomy

8.1K
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...
8.1K
Test Cross01:39

Test Cross

2.3K
2.3K
Test Cross01:39

Test Cross

44.6K
Alleles are different forms of the same gene. Humans and other diploid organisms inherit two alleles of every gene, one from each parent.
44.6K
Crossing Over01:34

Crossing Over

174.0K
Unlike mitosis, meiosis aims for genetic diversity in its creation of haploid gametes. Dividing germ cells first begin this process in prophase I, where each chromosome—replicated in S phase—is now composed of two sister chromatids (identical copies) joined centrally.
The homologous pairs of sister chromosomes—one from the maternal and one from the paternal genome—then begin to align alongside each other lengthwise, matching corresponding DNA positions in a process...
174.0K
Crossing Over01:30

Crossing Over

7.2K
Crossing over is the exchange of genetic information between homologous chromosomes during prophase I of meiosis I. Genetic recombination gives rise to allelic diversity in the newly formed daughter cells. In humans, crossing over produces genetically distinct haploid egg and sperm cells that undergo fertilization to produce unique offspring. Before cell division starts, the germ cell’s chromosome(s) undergo duplication in the S phase of the cell cycle. As the cells enter prophase I,...
7.2K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Outcome of Hearing Screening using Automated Auditory Brainstem Response (AABR) in Neonates Delivered through High Risk Pregnancies in Dhulikhel Hospital.

Kathmandu University medical journal (KUMJ)·2026
Same author

Reversing AV Block and Cardiogenic Shock in STEMI Care: A Case Report on Use of Fibrinolysis and Inotrope without PCI in Rural Nepal.

Kathmandu University medical journal (KUMJ)·2026
Same author

Quality of Life in Individuals with Tinnitus.

Kathmandu University medical journal (KUMJ)·2026
Same author

Diagnostic accuracy of computed tomography (CT)-based radiomics and artificial intelligence (AI) models in hepatocellular carcinoma: a systematic review and meta-analysis.

Clinical radiology·2025
Same author

The Surface-Topography Challenge: A Multi-Laboratory Benchmark Study to Advance the Characterization of Topography.

Tribology letters·2025
Same author

The Role of Python in Enhancing Radiotherapy Department Workflow Efficiency and Promoting Open-source Software Utilisation.

Clinical oncology (Royal College of Radiologists (Great Britain))·2025
Same journal

Foreign Body Migration from Subglottis to Bronchus in a Tracheostomised Child: A Case Report.

JNMA; journal of the Nepal Medical Association·2026
Same journal

Validation of the Nepalese Version of the Quality of Recovery-15 Questionnaire in Patients Undergoing Elective Surgery.

JNMA; journal of the Nepal Medical Association·2026
Same journal

Evaluation of Preference of Pain Scale in Children using Novel Animated Emoji Scale in Nepal: An Observational Study.

JNMA; journal of the Nepal Medical Association·2026
Same journal

Mucinous Ovarian Cancer in a Young Woman: A Case Report.

JNMA; journal of the Nepal Medical Association·2026
Same journal

Conundrum of Cholesterol Management and Health Implications of Low Cholesterol Levels: A Narrative Review.

JNMA; journal of the Nepal Medical Association·2026
Same journal

Clinical Profile and Management of Pleural Effusion at Tertiary Hospital of Nepal: An Observational Study.

JNMA; journal of the Nepal Medical Association·2026
See all related articles

Related Experiment Video

Updated: Mar 24, 2026

Microsurgical Obstruction of Testes Fusion in Spodoptera litura
03:38

Microsurgical Obstruction of Testes Fusion in Spodoptera litura

Published on: July 16, 2021

2.9K

Crossed Testicular Ectopia.

A Pradhan1, O B Panta2, D B Karki3

  • 1Kist Medical College and Hospital, Lalitpur,Nepal.

JNMA; Journal of the Nepal Medical Association
|March 17, 2016
PubMed
Summary
This summary is machine-generated.

Crossed testicular ectopia is a rare condition where a testis is found in the opposite scrotum. This case highlights successful preoperative diagnosis using imaging in a young boy with an undescended testis.

Keywords:
crossed ectopia; MRI; testis; ultrasonography.

More Related Videos

Vessel-Sparing Microsurgical Longitudinal Intussusception Vasoepididymostomy to Treat Epididymal Obstructive Azoospermia
06:28

Vessel-Sparing Microsurgical Longitudinal Intussusception Vasoepididymostomy to Treat Epididymal Obstructive Azoospermia

Published on: May 27, 2022

4.5K
Microscopic Cyst Resection for the Treatment of Patients Diagnosed with Epididymal Cyst
03:10

Microscopic Cyst Resection for the Treatment of Patients Diagnosed with Epididymal Cyst

Published on: March 31, 2023

13.4K

Related Experiment Videos

Last Updated: Mar 24, 2026

Microsurgical Obstruction of Testes Fusion in Spodoptera litura
03:38

Microsurgical Obstruction of Testes Fusion in Spodoptera litura

Published on: July 16, 2021

2.9K
Vessel-Sparing Microsurgical Longitudinal Intussusception Vasoepididymostomy to Treat Epididymal Obstructive Azoospermia
06:28

Vessel-Sparing Microsurgical Longitudinal Intussusception Vasoepididymostomy to Treat Epididymal Obstructive Azoospermia

Published on: May 27, 2022

4.5K
Microscopic Cyst Resection for the Treatment of Patients Diagnosed with Epididymal Cyst
03:10

Microscopic Cyst Resection for the Treatment of Patients Diagnosed with Epididymal Cyst

Published on: March 31, 2023

13.4K

Area of Science:

  • Urology
  • Pediatric Surgery
  • Medical Imaging

Background:

  • Crossed testicular ectopia (CTE) is a rare congenital anomaly characterized by the presence of both testes within the same hemiscrotum.
  • It is often asymptomatic and incidentally discovered during surgery for other conditions like inguinal hernias.
  • Preoperative diagnosis of CTE is uncommon, making imaging modalities crucial.

Observation:

  • A 12-year-old boy presented with a right undescended testis.
  • Diagnostic imaging, including Ultrasound and Magnetic Resonance Imaging (MRI), was performed.
  • These investigations revealed the condition to be crossed testicular ectopia.

Findings:

  • The patient was diagnosed preoperatively with crossed testicular ectopia.
  • Imaging confirmed the ectopic location of the right testis in the contralateral (left) hemiscrotum.
  • The left hemiscrotum was empty, consistent with CTE.

Implications:

  • Accurate preoperative diagnosis of CTE using Ultrasound and MRI is feasible.
  • This allows for appropriate surgical planning and management in pediatric patients.
  • Early identification can prevent potential complications associated with undescended testes.