Radiologic Manifestations of Colloid Cysts: A Pictorial Essay

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Radiologic Manifestations of Colloid Cysts: A Pictorial Essay Oktay Algin, MD, Evrim Ozmen, MD, Halil Arslan, MD Canadian Association of Radiologists Journal Volume 64, Issue 1, Pages 56-60 (February 2013) DOI: 10.1016/j.carj.2011.12.011 Copyright © 2013 Canadian Association of Radiologists Terms and Conditions

Figure 1 A 44-year-old female patient. (A) There was a 1.5-cm-diameter hyperintense lesion seen within the third ventricle in the neighbourhood of the foramen of Monro on computed tomographic evaluation. The cyst was hyperintense on T1-weighted (B), and isohypointense on T2-weighted images (C). Canadian Association of Radiologists Journal 2013 64, 56-60DOI: (10.1016/j.carj.2011.12.011) Copyright © 2013 Canadian Association of Radiologists Terms and Conditions

Figure 2 A 46-year-old male patient. (A) There was hydrocephalus and a 2-cm-diameter lesion hyperdense in appearance on axial computed tomographic evaluation, which was compatible with a colloid cyst (arrow). Although the lesion was hyperintense in axial T1-weighted images (B) (arrow), its centre was hypointense and the periphery was hyperintense on T2-weighted (C) and fluid-attenuated inversion recovery (D) images (arrow). Canadian Association of Radiologists Journal 2013 64, 56-60DOI: (10.1016/j.carj.2011.12.011) Copyright © 2013 Canadian Association of Radiologists Terms and Conditions

Figure 3 3-Tesla magnetic resonance images of a 45-year-old female patient with hydrocephalus. A colloid cyst, 18 mm in diameter, at the superior part of the third ventricle was observed, and there was hyperintense calcification within the cyst on axial (A) and coronal (B) reformatted 3-dimensional (3D) magnetization-prepared rapid gradient-echo imaging (MPRAGE) images (arrows). (C) The calcification within the cyst was in a hypointense pattern on coronal reformatted 3D sampling perfection with application-optimized contrasts using different flip-angle evolutions (SPACE) with constant flip-angle mode image (arrow). (D) Coronal reformatted 3D-SPACE with variant flip-angle mode image revealed a hypointense appearance compatible with the flow bilaterally through the foramina of Monro (arrow). (E) There was no diffusion restriction within the cyst on an axial diffusion-weighted (B1000) image (arrow). (F) Contrast material enhancement was not seen within the cyst or at the cyst wall on a contrast-material enhanced-axial reformatted 3D-MPRAGE image. Canadian Association of Radiologists Journal 2013 64, 56-60DOI: (10.1016/j.carj.2011.12.011) Copyright © 2013 Canadian Association of Radiologists Terms and Conditions

Figure 4 3-Tesla magnetic resonance evaluation of a 26-year-old male patient who was evaluated for headache and could not be previously diagnosed in another centre. (A) In 3-dimensional (3D) sampling perfection with application-optimized contrasts using different flip-angle evolutions (SPACE) sequence reformat views that were obtained with 0.6 × 0.6 × 0.6-mm voxel sizes, a cyst is seen that is approximately 8 mm in diameter, hypointense in the centre and hyperintense in the periphery. Coronal reformat (B) and sagittal reformat (C) that was obtained from this sequence suggests that the foramen Monro and aquaductus cerebri were open bilaterally, according to hypointense cerebrospinal fluid areas. Noncontrast 3D-T1-weighted images (D–F) show that there is an evident hyperintense area within the cyst (arrows). Canadian Association of Radiologists Journal 2013 64, 56-60DOI: (10.1016/j.carj.2011.12.011) Copyright © 2013 Canadian Association of Radiologists Terms and Conditions

Figure 5 A 25-year-old male patient who was accepted due to syncope attack. (A) There was hydrocephalus and a large (3.5 cm in diameter) colloid cyst on axial T2-weighted images. A shunt was applied under emergent conditions, and early postoperative axial T1-weighted (W) (B) and fluid-attenuated inversion recovery (FLAIR) (C) images of the cyst were hyperintense. Significant regression was observed in the cyst diameter after cyst aspiration at day 9, postoperative axial T2W (D), T1W (E), and FLAIR (F) images. In addition, in all sequences, the cyst ingredient was hypointense. Canadian Association of Radiologists Journal 2013 64, 56-60DOI: (10.1016/j.carj.2011.12.011) Copyright © 2013 Canadian Association of Radiologists Terms and Conditions