Testicles, or testes, make male hormones and sperm. They are two egg-shaped organs inside the scrotum, the loose sac of skin behind the penis. It's easy to injure your testicles because they are not protected by bones or muscles. Men and boys should wear athletic supporters when they play sports.
You should examine your testicles monthly and seek medical attention for lumps, redness, pain or other changes. Testicles can get inflamed or infected. They can also develop cancer. Testicular cancer is rare and highly treatable. It usually happens between the ages of 15 and 40.
- Scrotal Masses (Mayo Foundation for Medical Education and Research)
Diagnosis and Tests
- Genital Problems in Men (American Academy of Family Physicians) Available in Spanish
- Scrotal Ultrasound (Radiological Society of North America, American College of Radiology) Available in Spanish
- Testicle Pain (Mayo Foundation for Medical Education and Research)
- Testosterone Test (American Association for Clinical Chemistry)
Prevention and Risk Factors
- How to Do a Testicular Self Examination (Testicular Cancer Resource Center)
Videos and Tutorials
- Varicocele Surgery (OR-Live) - Beth Israel Medical Center, New York, NY, 2/24/2009
- ClinicalTrials.gov: Genital Diseases, Male (National Institutes of Health)
Journal ArticlesReferences and abstracts from MEDLINE/PubMed (National Library of Medicine)
- Article: IMAGES IN CLINICAL MEDICINE. Acute Varicocele Revealing Renal Cancer.
- Article: Re: Testicular Rerouting by Modified Prentiss Maneuver: Usefulness in Bilateral...
- Article: Re: Semen Parameters in Adolescents with Varicocele: Association with Testis...
- Testicular Disorders -- see more articles
- Glossary for Testicular Cancer and Related Conditions (Testicular Cancer Resource Center)
- Male Reproductive System (Nemours Foundation) Available in Spanish
- Testicle (Testicular Cancer Resource Center)
Find an Expert
- Find a Urologist (Urology Care Foundation)
- Communicating Hydrocele (American Academy of Pediatrics) Available in Spanish
- Hydrocele repair - slideshow Available in Spanish
- Retractile Testicle (Mayo Foundation for Medical Education and Research)
- Undescended Testicles (For Parents) (Nemours Foundation) Available in Spanish
- What Is a Pediatric Urologist? (American Academy of Pediatrics) Available in Spanish
- Anorchia Available in Spanish
- Hydrocele Available in Spanish
- Hydrocele repair Available in Spanish
- Hypogonadotropic hypogonadism Available in Spanish
- Orchitis Available in Spanish
- Scrotal masses Available in Spanish
- Testicle lump Available in Spanish
- Testicle pain Available in Spanish
- Testicular self-examination Available in Spanish
- Varicocele Available in Spanish