Intratubular germ cell neoplasia
Intratubular germ cell neoplasia
Updated: 02/03/2022
© Jun Wang, MD, PhD
General features
- AKA germ cell neoplasia in situ (GCNIS)
- Commonly in tissue adjacent to germ cell tumor
- Associated with gonadal dysgenesis, androgen insensitivity syndrome, infertility, cryptorchidism, contralateral testis in patients with prior testicular tumor
- May progress to germ cell tumor
- Usually incidental finding in biopsy for infertility evaluation
Pathological findings
- Large cells (fried eggs, 3x normal) with clear cytoplasm
- Thickened tubular basement membrane
- Displaces Sertoli cells toward the lumen
- Spermatogenesis usually absent
Marker
- PLAP
Management
- Watchful waiting (clinical and ultrasound examination)
- Serum measurement of hCG, AFP, human placental lactogen (HPL)
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