Pineal yolk sac tumour

Pineal yolk sac tumours are rare type of extragonadal yolk sac tumours. They make up a small fraction of all intracranial germ cell tumours and an even small fraction of pineal masses overall.

CSF biochemistry may demonstrate elevated levels of alpha-fetoprotein (AFP) which is helpful but not diagnostic of yolk sac tumours, as both immature teratomas and embryonal cell carcinomas may also elevate AFP levels 1.

Associations

As with other germ cell tumours, there may be an association with Down syndrome 1-3.

Pathology

In up to 50% of cases these tumours co-exist with other germ cell tumour histology 4.

Radiographic features

No specific imaging findings have been identified, with their appearance being similar to other germ cell tumours of the pineal region 4.


Pineal region masses

The pineal region is anatomically complex and plays host to a number of unique masses and tumours as well as potentially affected by many entities seen more frequently elsewhere in the brain. 

General reading

Pathology 

Germ cell tumours
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Article Information

rID: 6613
Synonyms or Alternate Spellings:
  • Pineal yolk sac carcinoma

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