Communicating spinal arachnoid cysts: diagnosis by delayed metrizamide computed tomography

Area of Science:

• Neurosurgery
• Radiology
• Spinal Imaging

Background:

• Extradural spinal arachnoid cysts are uncommon lesions.
• Their neuroradiologic characteristics are debated in the literature.
• Diagnosis often relies on advanced imaging techniques.

Observation:

• A case of an extradural spinal arachnoid cyst is presented.
• The lesion's neuroradiologic features are emphasized.
• Delayed metrizamide spinal computed tomography was used for diagnosis.

Findings:

• The cyst was definitively diagnosed via delayed metrizamide spinal computed tomography.
• The appearance of a communicating arachnoid cyst on delayed imaging is a novel finding.
• This specific imaging presentation is previously undescribed in English neurosurgical literature.

Implications:

• This case expands the understanding of extradural spinal arachnoid cyst imaging.
• Delayed metrizamide spinal computed tomography is a valuable tool for diagnosing such lesions.
• The findings contribute to the neuroradiologic and neurosurgical knowledge base regarding spinal cysts.