Colloid (Enterogenous) Cyst in the Frontal Lobe-Case Report-

Abstract

A 60-year-old man presented with a left frontal mass lesion incidentally detected at a health check without apparent symptoms. Computed tomography revealed the lesion as homogeneous high density and magnetic resonance (MR) imaging showed the lesion as hyperintense on T 1 -weighted images, isointense on T 2 -weighted images, and hypointense on diffusion-weighted images. T 1 -weighted MR images with gadolinium showed no enhancement of the mass lesion. Cerebral angiography revealed an avascular area around the left frontal lesion. Total removal of the lesion was achieved through a craniotomy without complications. Histological, immunohistochemical, and electron microscopy examinations established the definite diagnosis of colloid cyst.

Sudden death due to a colloid cyst of the third ventricle: Report of three cases with a special sign at autopsy

“…This type of cyst was first described by Wallman in 1858, and Dandy, in 1922, depicted these cysts via ventriculography and pneumoencephalography [14]. They are predominantly located in third ventricle, however, other locations may include the frontal lobe [12], leptomeninges [15], cerebellum [16], brainstem [17], brain convexity [18], the region of the optic chiasma [19] and the fourth ventricle [20].…”

“…Such cysts contain mucoid and gelatinous material, which is positive for both Periodic acid Schiff (PAS) and mucicarmen staining [12,13]. This type of cyst was first described by Wallman in 1858, and Dandy, in 1922, depicted these cysts via ventriculography and pneumoencephalography [14].…”

Rare location of a colloid cyst - case presentation

“…Colloid cysts are found throughout the neuroaxis, but over 99% of them develop in the third ventricle, in most cases in the anterior roof5. Sometimes these tumors develop in sellar region, in the fourth ventricle (6, 7), velum interpositum (8, 9), intrapontomesencephalic (10), premedullary/pontine cistern (11), cerebellum (12), the region of the optic chiasma (13) or frontal lobe (14).…”

Surgical Strategy for Intracranial Endodermal Cyst-Two Case Reports-

“…The cyst contents usually appear as hypo-, iso-, or hyperintensity on T 1 -and T 2 -weighted MR images, probably based on the presence of protein, hemorrhage, and fat. 3,4,11,16,20) Opaque or whitish, thin cyst walls are surgically explored in most cases, but the cyst contents may be opaque, 9) white, 1,12,16) straw, 5) or green 2) in color, and with creamy, 11,16,21) gelatinous, 12) or mucoid 2,4,14,22) consistency. FLAIR MR imaging can differentiate endodermal cyst from arachnoid cyst.…”