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Introduction TOP Introduction References We read with interest the article by Armao et al in the September 2000 issue of the AJNR ( 1 ). The authors described the postmortem MR imaging of a patient with a colloid cyst, demonstrating a central portion of the cyst with short-T1 and short-T2 characteristics, and a peripheral rim with long T1s and long T2s. As early as 1990 ( 2 ), we described these two layers in colloid cysts of the third ventricle, both in vivo and in an autopsy specimen. At pathology, the outer component was composed of amorphous material and cellular debris and the inner component consisted of viscous material. Later, when preparing a CD-ROM on brain tumors for the series of the European Society of Neuroradiology ( 3 ), we reviewed the intraoperative videotape of one of the patients. We noted that the central part of the colloid cyst was filled with viscous but semiliquid material that easily drained after opening the cyst, while the outer part of the cyst was filled with more solid material and had to be removed by curreting. We suggested that the liquid versus solid state of the different parts of the cyst could explain the MR findings with the different sequences. The intraoperative and MR findings of our patients are very similar to those of the 3-minute boiled egg, as described in the article by Armao et al, and match the postmortem MR findings in their patient. We are pleased that the authors could provide further proof to confirm our earlier hypothesis. References TOP Introduction References Armao D, Castillo M, Chen H, Kwock L. Colloid cyst of the third ventricle: imaging-pathologic correlation. AJNR Am J Neuroradiol 2000;21:1470-1477 [Abstract/ Free Full Text] Wilms G, Marchal G, Van Hecke P, et al. Colloid cysts of the third ventricle: MR findings. J Comput Assist Tomogr 1990;14:527-531 [Medline] Wilms G, Balériaux D, et al. Imaging of Cerebral Tumors . CD-ROM. 2nd ed. 1999: edited by Lasion Europe This article has been cited by other articles: J. Klisch and M. Schumacher Dural Arteriovenous Fistulae: Noninvasive Diagnosis with Dynamic MR Digital Subtraction Angiography AJNR Am. J. Neuroradiol., October 1, 2002; 23(9): 1614 - 1614. [Full Text] [PDF] S. C. Coley, C. A.J. Romanowski, T. J. Hodgson, and P. D. Griffiths Reply AJNR Am. J. Neuroradiol., October 1, 2002; 23(9): 1614 - 1615. [Full Text] [PDF] This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Wilms, G. Search for Related Content PubMed PubMed Citation Articles by Wilms, G. Hotlight (NEW!) What's Hotlight? Home Subscribe Author Instructions Submit Online Search the AJNR Archives Feedback Help Copyright © 2010 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X
American Journal of Neuroradiology – American Journal of Neuroradiology
Published: Sep 1, 2001
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