Giant, lamellated colloid cyst: 'Russian-Doll' appearance

Area of Science:

• Neurosurgery
• Radiology
• Pathology

Background:

• Colloid cysts (CCs) are common, typically small, benign intracranial lesions.
• They are usually found at the foramen of Monro and measure 1-3 cm.

Purpose of the Study:

• To describe a rare case of a giant colloid cyst.
• To document its unique radiological appearance and correlate it with surgical and pathological findings.

Main Methods:

• Case report of a giant colloid cyst.
• Radiological imaging (detailed description of concentric layers).
• Intraoperative and histopathological analysis.

Main Results:

• A giant colloid cyst measuring 6 x 5.2 x 4.4 cm was identified.
• The cyst exhibited a unique radiological appearance with multiple concentric layers of varying intensities.
• This appearance correlated with intraoperative findings and histopathology.

Conclusions:

• Giant colloid cysts can present with unusual radiological features.
• The concentric layered appearance is likely due to variations in hydration and protein concentration.
• This case expands the understanding of colloid cyst morphology and presentation.