Disease or Syndrome
orchitis Audio
or·chi·tis [ awr-kahy-tis ]
Subclass of:
Testicular Diseases
Etymology:
Greek orchis = testicle + -itis = inflammation
Definitions related to orchitis:
  • Inflammation of a TESTIS. It has many features of EPIDIDYMITIS, such as swollen SCROTUM; PAIN; PYURIA; and FEVER. It is usually related to infections in the URINARY TRACT, which likely spread to the EPIDIDYMIS and then the TESTIS through either the VAS DEFERENS or the lymphatics of the SPERMATIC CORD.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • Inflammation of one or both testes due to viral or bacterial infections. Signs and symptoms include enlargement or tenderness of the affected testis, inguinal lymphadenopathy, blood in the semen, and pain during urination, intercourse, or ejaculation.
    NCI
    U.S. National Cancer Institute, 2021
  • Inflammation of one or both testicles.
    NICHD Pediatric Terminology
    U.S. National Cancer Institute, 2021
  • Testicular inflammation.
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2025
  • Orchitis is infection of the testes, typically with mumps virus. Symptoms are testicular pain and swelling. Diagnosis is clinical. Treatment is symptomatic. Antibiotics are given only if bacterial infection is identified.
    Merck Manuals
    Merck & Co., Inc., 2025
  • Orchitis is infection of the testes, typically with mumps virus. Symptoms are testicular pain and swelling. Diagnosis is clinical. Treatment is symptomatic. Antibiotics are given only if bacterial infection is identified.
    Merck Manuals
    Merck & Co., Inc., 2025
  • Orchitis is an acute inflammatory reaction of the testis secondary to infection. Most cases are associated with a viral mumps infection; however, other viruses and bacteria can cause orchitis.
    Medscape
    WebMD, 2025
  • Orchitis (or-KIE-tis) is an inflammation of one or both testicles. Bacterial or viral infections can cause orchitis, or the cause can be unknown. Orchitis is most often the result of a bacterial infection, such as a sexually transmitted infection (STI). In some cases, the mumps virus can cause orchitis.
    Mayo Clinic
    Mayo Foundation for Medical Education and Research, 2025
  • Orchitis, inflammation and swelling of the testes as a result of infection or physical injury. The testes are a pair of organs located in the scrotum of the male; they produce sperm cells for reproduction. Connected to the back of each testis is the epididymis, which serves as a storage duct for...
    Encyclopedia Britannica
    Encyclopedia Britannica, Inc., 2025
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.