3.1 Adrenal cortical rest in spermatic cord
3.2 Adrenogenital syndrome: testicular tumor
3.3 Androgen insensitivity syndrome
3.3.1 and seminoma
3.4 Appendix testis
3.5 Burned-out tumor
3.6 Choriocarcinoma
3.7 Cryptorchidism
3.7.1 with seminoma
3.7.2 with bilateral combined tumor
3.8 Embryoid bodies
3.9 Embryonal carcinoma
3.9.1 solid
3.9.2 papillary
3.9.3 intratubular
3.9.4 with undifferentiated stroma
3.9.5 in cryptorchid testis
3.9.6 with vascular invasion
3.9.7 with spermatic cord invasion
3.9.8 with intraluminal spread to rete testis
3.9.8.1 pagetoid spread
3.9.9 with syncytiotrophoblast cells
3.9.10 with germ cell neoplasia in situ
3.10 Epidermoid cyst
3.11 Fibrothecoma
3.12 Germ cell aplasia (Sertoli cell-only syndrome)
3.13 Germ cell neoplasia in situ
3.14 Gonadal dysgenesis
3.14.1 with ovarian-like stroma, fallopian tube, vas deferens, and gonadoblastoma
3.14.2 with gonadoblastoma, and seminoma
3.15 Gonadoblastoma
3.15.1 dissecting
3.16 Granulocytic sarcoma
3.17 Granulosa cell tumor
3.17.1 Adult type
3.17.2 Juvenile type
3.18 Hemangioma
3.19 Hypospermatogenesis
3.20 Infarct
3.20.1 In torsion
3.20.2 In utero
3.21 Infertility (See 3.12; 3.19; 3.27; 3.33; and, 3.36)
3.22 Klinefelter syndrome
3.23 Large cell calcifying Sertoli cell tumor
3.24 Leydig cell tumor
3.25 Lymphoma/Leukemia
3.25.1 Lymphoma
3.25.2 Leukemia
3.25.2.1 In adults
3.25.2.2 In children
3.26 Malacoplakia
3.27 Maturation arrest
3.27.1 In spermatocytes
3.27.2 In spermatids
3.28 Metastasis
3.28.1 from prostate
3.28.2 from urinary bladder
3.29 Microlithiasis
3.30 Mixed germ cell tumors
3.30.1 Diffuse embryoma
3.30.2 Seminoma + embryonal carcinoma
3.30.3 Teratocarcinoma
3.31 Morgagni’s hydatid (see Appendix testis)
3.32 Normal histology
3.32.1 Leydig cells
3.32.1.1 Ectopic
3.32.1.2 Reinke’s crystals
3.32.2 Rete testis
3.32.3 Seminiferous tubules
3.33 Normal spermatogenesis (excurrent duct obstruction)
3.34 Orchitis
3.34.1 Acute
3.34.2 Granulomatous
3.34.2.1 Nonspecific (idiopathic)
3.34.2.2 Tuberculous
3.34.2.3 Syphilitic
3.35 Ovotestis
3.36 Peritubular fibrosis
3.36.1 tubular complete fibrosis
3.37 Polyembryoma
3.38 Prepubertal testis
3.38a Primitive neuroectodermic tumor(PNET)
3.39 Rete testis
3.39.1 ectasia
3.39.2 hyperplasia
3.39.2.1 in cryprorchid testis
3.39.2.2 in testis with neoplasia
3.40 Schistosomiasis (S. mansoni)
3.41 Seminoma
3.41.1 with frequent mitoses
3.41.2 with tubule-like arrangement
3.41.3 with compression and carryover artifacts
3.41.4 with syncytiotrophoblasts
3.41.5 with Leydig cell hyperplasia
3.41.6 with granulomatous reaction
3.41.7 intratubular
3.41.8 associated with tubular microcalcifications
3.41.9 with pagetoid spread to the rete testis
3.41.10 with dense lymphocytic infiltrate
3.41.11 metastases
3.41.12 anaplastic (atypical)
3.42 Sertoli cell nodules
3.42.1 in cryptorchid testis
3.43 Sertoli cell tumor
3.43.1 large cell calcifying (see 3.23)
3.43.2 malignant
3.43.3 rich in lipid
3.43.4 sclerosing
3.43.5 in a dog
3.44 Spermatocytic tumor
3.45 Spermatozoa
3.45.1 Detected in a smear from vasovasoanastomosis
3.46 Stromal tumor of the testis, unclassified
3.47 Teratoma
3.47.1 mature
3.47.1.1 vascular emboli in the spermatic cord
3.47.2 immature
3.47.3 with somatic type malignancy
3.47.3.1 carcinomatous
3.47.3.2 post-chemotherapy
3.48 Testiculosplenic fusion
3.49 Vasculitis
3.50 Yolk sac tumor
3.50.1 microcystic or macrocystic (reticular)
3.50.2 solid
3.50.3 glandular/alveolar
3.50.4 endodermal sinus/perivascular (Schiller-Duval bodies)
3.50.5 papillary
3.50.6 myxomatous
3.50.7 sarcomatoid
3.50.8 polyvesicular vitelline
3.50.9 hepatoid
3.50.10 parietal
3.50.11 with hyalin globules
3.50.12 vascular invasion
3.50.13 with syncytiotrophoblasts
3.50.14 combined with embryonal carcinoma (polyembryoma)