Classification of Testicular and Paratesticular Tumors and Tumor-like lesions.

Germ Cell Tumors
  Precursor lesions
    Intratubular germ cell neoplasia, unclassified
  Intratubular germ cell neoplasia, specific types
  Germ cell tumors of one histologic type
    Seminoma
  Variant: with syncytiotrophoblast cells
  Spermatocytic seminoma
  Variant: with sarcomatous component
  Embryonal carcinoma
  Yolk sac tumor (endodermal sinus tumor)
  Trophoblastic tumors
    Choriocarcinoma
    Placental site trophoblastic tumor
    Unclassified
  Teratoma
    Mature teratoma
      Variant: dermoid cyst
    Immature teratoma
    Teratoma wth a secondary malignant component (specify)
    Monodermal teratoma
      Carcinoid
      Primitive neuroectodermal tumor
      Others
  Germ cell tumors of more than one histologic type
    Mixed germ cell tumors (specify individual components and estimate their amount as percentage of the tumor)
      Polyembryoma
      Diffuse embryoma
  Regressed ("Burnt Out") germ cell tumors
    Scar only
    Scar with intratubular germ cell neoplasia
    Scar with minor residual germ cell tumor (teratoma, seminoma, or other)
Germ Cell -Sex Cord-Stromal Tumors
  Gonadoblastoma
  Unclassified
Sex Cor-Stromal Tumors
  Sertoli-stromal cell tumors
    Sertoli cell tumor
      Variants: large cell calcifying
  sclerosing
    Sertoli-Leydig cell tumor
    Leydig cell tumor
  Granulosa-stromal cell tumors
    Granulosa cell tumor
      Variants: adult
        juvenile
    Tumors in the fibroma-thecoma group
  Mixed
  Unclassified
Tumors of the Rete Testis
  Adenoma / Adenofibroma / Cystadenoma
  Carcinoma
Miscellaneous (including unclassified tumors and tumors of uncertain cell type)
Paratesticular Tumors (including tumors of spermatic cord)
  Tumors of ovarian epithelial type
  Adenomatoid tumor
  Malignant mesothelioma
  Desmoplastic small round cell tumor
  Epididymal cystadenoma
  Epididymal carcinoma
  Melanotic neuroectodermal tumor (retinal anlage tumor)
  Benign (or locally aggressive) soft tissue-type tumors
    Fibromatous tumors
    Vascular tumors
    Aggressive angiomyxoma
    Angiomyofibroblastoma
    Calcifying fibrous pseudotumor
    Others
  Malignant soft tissue-type tumors
    Rhabdomyosarcoma
      Embryonal
        Variant: spindle cell
      Alveolar
      Others
    Liposarcoma
      Well-differentiated
      Pleomorphic / round cell
      Others
    Leiomyosarcoma
    Others
  Miscellaneous
Hematopoietic Tumors
  Lymphoma
  Plasmacytoma
  Leukemia and granulocytic sarcoma
Secondary Tumors