Cancer/Testis Antigen

**Semantic type:** Amino Acid, Peptide, or Protein

**Definition:** A family of immunogenic proteins that are found in a wide variety of tumors but are not expressed in adult somatic cells. Non-pathologic expression of these proteins is restricted to male germ cells.

**Synonyms:** - CT - CTA - CTAs - CTs - Cancer Testis Antigen - Cancer Testis Antigens - Cancer/Testis Antigens