Non-seminomatous germ cell tumours

Non-seminomatous germ cell tumours (NSGCT) is one of the main groups of germ cell tumours (the other being seminoma). Although they are made up of distinct histological entities, in general, they have similar radiographic appearances. They can, however, be found widely in the body, with variable imaging features, pathology, treatment and prognosis. As such they are discussed separately.

This article focuses on a general discussion of NSGCTs, as well as providing a structure to individual articles.

They occur in younger patients than seminoma, with a peak incidence in late teens to twenties. They are the most common primary testicular malignancy, accounting for ~60% of cases.

Some consider testicular microlithiasis is a risk factor for germ-cell tumours, although this is controversial.

They tend to be more aggressive than seminomas, and frequently metastasise.

Serological markers

Approximately 70% of NSGCTs produce hormonal markers (tumour markers):

Non-seminomatous germ cell tumours can be divided histologically into:

See: classification of germ cell tumours.

In contrast to seminomas, NSGCTs tend to be more heterogeneous with frequent cystic areas or calcification. They tend to be more aggressive than seminomas and tunica invasion is common. The appearance of an individual tumour will, of course, vary depending on the location. Please refer to the parent article germ cell tumours for links to specific locations.

Imaging is also essential for the staging of NSGCT which is location dependent. See: testicular cancer staging.

The prognosis of non-seminomatous germ cell tumours is variable and depends on the biological behaviour of individual tumours. Prognosis can be inferred from tumour markers, the location of the primary tumour and of course presence of metastases 4.

  • good prognosis (all of the following must be true)
    • tumour markers
      • alpha-fetoprotein <1000 ng/mL
      • beta HCG <5000 IU/L
      • LDH <1.5x upper limit of normal
    • non-mediastinal location of the primary tumour
    • no nonpulmonary metastases

    These patients are usually treated with orchiectomy followed by chemotherapy (Bleomycin, Etoposide and Cisplatin - BEP regimen).

  • intermediate prognosis (all of the following must be true)
    • tumour markers
      • alpha-fetoprotein: 1000-10,000 ng/mL
      • beta-hCG: 5000-50,000 IU/L
      • LDH: 1.5-10x upper limit of normal
    • non-mediastinal location of the primary tumour
    • no nonpulmonary metastases

    These patients are started with chemotherapy cycles and sometimes followed by adjuvant surgery.

  • poor prognosis (any of the following):
    • tumour markers
      • alpha-fetoprotein: >10,000 ng/mL
      • beta-hCG: >50,000 IU/L
      • LDH: >10x upper limit of normal
    • mediastinal primary tumour
    • nonpulmonary metastases present

Considering a poor prognosis, surgery is usually precluded, and patients are followed with aggressive chemotherapy.

Germ cell tumours
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Article information

rID: 1734
System: Urogenital
Section: Gamuts
Synonyms or Alternate Spellings:
  • Nonseminomatous germ cell tumour
  • NSGCT
  • Non seminomatous germ cell tumours
  • Non seminomatous germ cell tumour
  • Non-seminomatous germ cell tumours (NSGCT)

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Cases and figures

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    Figure 1: gross pathology
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    Figure 2: NSGCT testis
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    Case 1: mixed germ cell tumour
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    Pure yolk sac tum...
    Case 2: pure yolk sac tumour
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     Case 3
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    Case 4
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