Dynamic MR imaging patterns of cerebral fat embolism: a systematic review with illustrative cases

Area of Science:

• Neurology
• Radiology
• Pathology

Background:

• Cerebral fat embolism (CFE) is a serious complication with varied MR imaging presentations.
• A systematic review of CFE's MR imaging patterns is lacking.

Purpose of the Study:

• To systematically describe the MR imaging patterns of CFE.
• To correlate these patterns with disease progression and underlying mechanisms.
• To enhance clinical management and patient outcomes through improved diagnostic recognition.

Main Methods:

• Systematic review of literature on MR imaging in CFE.
• Identification and categorization of distinct MR imaging patterns.
• Analysis of temporal evolution and correlation with clinical course.

Main Results:

• Five distinct MR imaging patterns were identified: scattered embolic ischemia (acute), confluent symmetric cytotoxic edema (subacute), vasogenic edema (subacute), petechial hemorrhage (acute to chronic), and chronic sequelae (late stage).
• Each pattern's typical timing and location were described.
• Underlying pathophysiological mechanisms were discussed for each pattern.

Conclusions:

• The five identified MR imaging patterns represent an evolving spectrum of CFE.
• Understanding these patterns aids in timely diagnosis and appropriate management.
• Recognition of evolving MR imaging findings can potentially improve patient outcomes in CFE.