[Parietal multilocular arachnoid cysts in adults. 2 cases]

Area of Science:

• Neurology
• Neurosurgery
• Radiology

Background:

• Arachnoid cysts are cerebrospinal fluid collections within the arachnoid mater.
• Multiloculated arachnoid cysts are less common than simple cysts.
• Parietal lobe cysts are infrequently reported.

Observation:

• Two adult patients (57 and 69 years old) presented with multiloculated arachnoid cysts in the parietal area.
• The cysts exhibited distinct topographical and morphological characteristics.
• Imaging revealed lesions differing from typical sylvian fissure arachnoid cysts.

Findings:

• The parietal location, multiloculated nature, and adult onset differentiate these cases.
• Pathophysiological discussion points to potential developmental or post-traumatic origins.
• The cysts' evolution and anatomical context were analyzed.

Implications:

• These findings expand the understanding of arachnoid cyst diversity.
• The study highlights the importance of considering varied etiologies for parietal arachnoid cysts.
• Further research may clarify the specific pathophysiology of these rare lesions.