| 释义 |
Padlock Sign A rare CT finding in which a mass density is accompanied by adjacent ring enhancement, representing eccentric cavitation in a solid intracranial lesion; while characteristic of higher grade astrocytomas, abscesses, and metastases, it is also seen in craniopharyngioma, meningioma, prolactinoma—with cystic changes—and tuberculosis, and thus has little diagnostic specificity |