"Claw" sign = enhancing rim of compressed pituitary surrounding non-enhancing cyst.
Rathke cleft cyst is a nonneoplastic cyst arising from remnants of embryonic Rathke cleft.
Top differential diagnoses:
cystic pituitary adenoma
- other non-neoplastic cysts
The claw sign has also been used in radiological literature with respect to Wilms tumor.