MRI findings include variable signal intensity on T1 due to variable protein content within the cyst, high signal on T2 and occasionally slight enhancement of the thin cyst wall.
A sagittal proton density image d reveals high signal within the fluid (due to high mucopolysaccharide content); thin rim enhancement was noted with contrast (arrow) e Peripheral rim-like gadolinium contrast enhancement can be seen, or there can be complete lack of enhancement.
The inflammatory lesions usually present high signal intensity on T2-weighted image and a thin superficial enhancement after contrast administration, while the tumors reveal relatively lower signal intensity on T2-weighted image and solid enhancement with contrast administration.
Perineural vascular plexus surrounds the Gasserian ganglion and proximal V2 and V3 rootlets, resulting in normal findings of thin mild enhancement [23].
Post-contrast sagittal T1-weighted image (c) shows thin peripheral enhancement of the pineal cyst wall as well as minimal dependent layering of contrast within the cyst.
Contrast-enhanced CT images showed normal findings at the vaginal dome (arrow in A), moderate pelvic effusion with thin serosal enhancement, and residual intraperitoneal air.
A C) after recent laparoscopic hysterectomy (LH), clinical diagnosis of pelvic cellulitis corresponded to a bilobated fluid-like collection with thin peripheral enhancement.
The pineal cysts that were rechecked (n = 2) were multilocular and showed thin gadolinium enhancement of the wall and septa, with no visible nodules (Figs. 2 and 3).
Open image in new window Fig. 2 Two-year-old child with axial fat-suppressed T1 post-contrast and sagittal short tau inversion recovery (STIR) images demonstrating a rounded and well-defined T1 isointense, T2 hyperintense lesion with thin peripheral enhancement (thick white arrows).
Open image in new window Fig. 1 A, B) Usual contrast-enhanced CT appearance after recent abdominal hysterectomy (AH), including a non-distended vagina (arrows) with slight upwards retraction of the vaginal dome in sagittal view (A), preserved band-like transverse configuration and thin mucosal enhancement (B), minimal presacral fluid.
