Extragonadal germ cell tumor?
Answers: 95% of all testicular tumors are germ cell tumors. That is, the tumors start in the sperm forming cell in the testicles (the males gonads) or egg producing cell in the ovary (female gonads). Occasionally, however, germ cell tumors develop elsewhere within the body without any evidence of cancer contained by the testes. When this happens they are referred to as Extragonadal Germ Cell Tumors (meaning outside of the gonads).
During embryonic nouns (when you are but a clump of cells), germ cells are first see outside of the embryo in the yolk sac. At more or less 4 to 6 weeks of development, these cell migrate into the embryo where they populate the developing testes or ovaries. If these cell miss their destination, they are likely to come to rest within one of a number of midline sites surrounded by the body. Extragonadal tumors arise when these cells become cancerous. In some cases, however, an adjectives extragonadal tumor turns out to be a metastatic testicular tumor where the primary tumor have "burnt out" or died on its own.
Extragonadal germ cell tumors can give somebody a lift on a variety of tumor types. They can be any benign (teratoma) or malignant. Malignant tumors can be either seminoma [aka germinoma within females] or nonseminoma (embryonal carcinoma, immature teratoma, endodermal sinus tumor [aka yolk sac tumor], choriocarcinoma, and mixed germ cell tumors). Although much more adjectives in males, extragonadal tumors can also crop up in females.
The great majority (80%) of these tumors are benign and are handle with surgery alone. Most of the benign tumors take place in children. While benign tumors transpire with equal frequency surrounded by men and women, malignant extragonadal tumors are much more common surrounded by males (9:1). Understand this, though: extragonadal germ cell tumors are rare, accounting for lone 1 to 4% of all germ cell tumors.
This type of cancer is aggressive and is usually see in infantile adults. Patients with mediastinal nonseminomatous EGC are typically classed as poor risk patients because these cancer often hold unusual biological features that diminish cure rates and add superfluous complexities to treatment. Despite these unusual characteristics, about partly of even these patients are cured. Other extragonadal sites do not share these same adverse biological features and are usually classified with an intermediate prognosis. For adjectives extragonadal seminomas, the outlook is identical to metastatic testicular seminomas near the same soaring prospect of cure.
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