Journal of Korean Neurosurgical Society

The Korean Neurosurgical Society (대한신경외과학회)
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Craniopharyngiomas : Radiological Differentiation of Two Types

  • Lee, In Ho (The Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins Medical Institutions) ;
  • Zan, Elcin (The Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins Medical Institutions) ;
  • Bell, W. Robert (Department of Pathology, The Johns Hopkins Medical Institutions) ;
  • Burger, Peter C. (Department of Pathology, The Johns Hopkins Medical Institutions) ;
  • Sung, Heejong (Genometrics Section, Computational and Statistical Genomics Branch, National Human Genome Research Institute, National Institutes of Health) ;
  • Yousem, David M. (The Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins Medical Institutions)
  • Received : 2016.01.13
  • Accepted : 2016.07.04
  • Published : 2016.09.01
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Abstract

Objective : To determine imaging features that may separate adamantinomatous and papillary variants of craniopharyngiomas given that tumors with adamantinomatous signature features are associated with higher recurrence rates, morbidity, and mortality. We specifically reviewed calcification on CT, T1 bright signal intensity, and cystic change on T2 weighted images for differentiating these two types. Methods : We retrospectively reviewed the MRI and CT studies in 38 consecutive patients with pathologically proven craniopharyngiomas between January 2004 and February 2014 for the presence of calcification on CT scans, bright signal intensity on T1 weighted images, and cystic change on T2 weighted images. Results : Of the 38 craniopharyngiomas, 30 were adamantinomatous type and 8 were papillary type. On CT scans, calcification was present in 25 of 38 tumors. All calcified tumors were adamantinomatous type. Twenty four of 38 tumors had bright signal intensity on T1 weighted images. Of these 24 tumors, 22 (91.7%) were adamantinomatous and 2 were papillary type. Cystic change on T2 weighted images was noted in 37 of 38 tumors; only 1 tumor with papillary type did not show cystic change. Conclusion : T1 bright signal intensity and calcification on CT scans uniformly favor the adamantinomatous type over papillary type of craniopharyngioma in children. However, these findings are more variable in adults where calcification and T1 bright signal intensity occur in 70.6% and 58.8% respectively of adult adamantinomatous types of craniopharyngiomas.

Keywords

References

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