"Ossifying" hemangiomas of the temporal bone: evaluation with CT

Area of Science:

• Neurology
• Radiology
• Otolaryngology

Background:

• Facial nerve hemangiomas are rare but can cause progressive or recurrent facial paralysis.
• Distinguishing hemangiomas from other facial nerve tumors, such as schwannomas, is crucial for appropriate management.

Purpose of the Study:

• To investigate the radiologic features of temporal bone hemangiomas affecting the facial nerve.
• To assess the diagnostic utility of computed tomography (CT) in identifying these lesions.

Main Methods:

• Retrospective review of six patients with facial paralysis and suspected temporal bone lesions.
• Detailed analysis of CT scans to identify lesion characteristics, including size, margin, and presence of intratumoral bone spicules.

Main Results:

• All six patients presented with slowly progressive or recurrent facial paralysis.
• CT demonstrated lesions enlarging the facial nerve canal with characteristic intratumoral bone spicules.
• Temporal bone expansion with indistinct margins was a typical finding.

Conclusions:

• Temporal bone hemangiomas are an underrecognized cause of facial nerve dysfunction.
• The presence of intratumoral bone spicules on CT is a key diagnostic indicator differentiating hemangioma from schwannoma.