page_title: Germinoma
section_title: Ovary (dysgerminoma) and testis (seminoma)
hierarchical_section_title: Germinoma / Diagnosis / Locations / Ovary (dysgerminoma) and testis (seminoma)
caption_attribution_description: Seminoma of the Testis
context_page_description: A germinoma is a type of germ-cell tumor, which is not differentiated upon examination. It may be benign or malignant.
context_section_description: Dysgerminoma is the most common type of malignant germ-cell ovarian cancer. Dysgerminoma usually occurs in adolescence and early adult life; about 5% occur in prepubertal children. Dysgerminoma is extremely rare after age 50. It occurs in both ovaries in 10% of patients and, in a further 10%, a microscopic tumor is in the other ovary.
  Seminoma is the second-most common testicular cancer;  the most common is mixed, which may contain seminoma.
  Abnormal gonads (due to gonadal dysgenesis and androgen insensitivity syndrome) have a high risk of developing a dysgerminoma. Most dysgerminomas are associated with elevated serum lactic dehydrogenase, which is sometimes used as a tumor marker.Metastases are most often present in the lymph nodes.
caption: A 7.4 x 5.5-cm seminoma in a radical orchiectomy specimen from a 27-year-old man
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