Tumors and a Tumor-like
"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
The Claw sign has also been used in radiological literature with respect to Wilms tumor.