Testicular Tumors

the World Health Organization classification system for testicular tumours:

• Germ cell tumours
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  • Precursor lesions
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    • Intratubular germ cell neoplasia
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      • Unclassified type (carcinoma in situ)
      • Specified types
  • Tumours of one histologic type (pure forms)
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    • Seminoma
    • Spermatocytic seminoma
    • Embryonal carcinoma
    • Yolk sac tumor
    • Trophoblastic tumors
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      • Choriocarcinoma
      • Placental site trophoblastic tumor
      • Cystic trophoblastic tumor
    • Teratoma
  • Tumours of more than one histologic type (mixed forms)
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    • Embryonal carcinoma and teratoma
    • Teratoma and seminoma
    • Choriocarcinoma and teratoma.embryonal carcinoma
    • Others
• Sex cord/Gonadal stromal tumours
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  • Leydig cell tumour
  • Sertoli cell tumour
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    • Lipid rich variant
    • Scleriosing variant
    • Large cell calcifying variant
    • Intratubular sertoli cell neoplasia in Peutz-Jeghers syndrome
• Granulosa cell tumour
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    • Adult type
    • Juvenile type
• Thecoma Fibroma Group
• Sex cord/gonadal stromal tunour - incompletely differentiated
• Sex cord/gonadal stromal tumour - mixed types
• Mixed Germ Cell and Sex Cord/Gonadal Stromal Tumours
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  • Gonadoblastoma
  • Germ cell-sex cord/gonadal stromal tumour, unclassified
• Miscellaneous tumours of the testis
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  • Carcinoid
  • Tumors of ovarian epithelial types
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    • Serous tumor of borderline malignancy
    • Serous carcinoma
    • Well differentiated endometrioid tumor
    • Mucinous cystadenoma
    • Mucinous cystadenocarcinoma
    • Brenner tumor
  • Nephroblastoma
  • Paraganglioma
• **Haematopoietic tumours**
• Tumours of collecting ducts and rete
• Tumours of the paratesticular structures
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  • Adenomatoid tumour
  • Malignant and Benign Mesothelioma
  • Adenocarcinoma of the epididymis
  • Papillary cystadenoma of the epididymis
  • Melanotic neuroectodermal tumour
  • Desmoplastic small round cell tumour
• Mesenchymal tumours of the spermatic cord and testicular adnexae