Tumor that show presence of rudimentary fragments of serval tissues.It consists of remnant embryonic tissue that has developed into aberrant organs.The most frequent tumors are dermoid cyst of the ovary and of the testicles well as coccygeal fistula.A microscopic biopsy is required in other to establish precise diagnosis.The sort of treatment will depend upon the charakteristics shown on the anatomo- pathological exam.Surgical removal of the tumor may be necessary.