Pineal yolk sac tumor

Pineal yolk sac tumors are rare type of extragonadal yolk sac tumors. They make up a small fraction of all intracranial germ cell tumors 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 tumors, as both immature teratomas and embryonal cell carcinomas may also elevate AFP levels 1.

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

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

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

Pineal region masses

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

General reading


Germ cell tumours
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Article information

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

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