Rathke cleft cyst

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[edit] Discussion of Rathke cleft cyst

  • Rathke cleft cysts are congenital nonneoplastic cysts arising from remnants of the embryonic Rathke cleft.
  • They are common incidental intra- and/or suprasellar lesions.
  • Forty percent are completely intrasellar, while 60% have some suprasellar extension
  • Symptoms can occur from compression of the optic chiasm, hypothalamus, or pituitary gland.

[edit] Differential Diagnosis of Rathke cleft cyst

[edit] Imaging Findings for Rathke cleft cyst

  • Imaging characteristics vary widely.
  • Smoothly marginated cysts that vary in size from a few millimeters to 1–2 cm.
  • Nonenhancing noncalcified intra- and/or suprasellar cyst with an intracystic nodule: small nonenhancing intracystic nodule is considered a virtually pathognomonic sign of a Rathke cleft cyst.
  • Approximately half are hyperintense on T1-weighted images, while half are hypointense.
  • On T2-weighted images, 70% are hyperintense and 30% are iso- or hypointense.

[edit] Images

Patient #1: Contrast enhanced MR images demonstrate a Rathke cleft cyst

[edit] See Also

[edit] External Links

[edit] References for Rathke cleft cyst