Germinoma CT: Difference between revisions
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==Overview== | |||
Head and neck CT scan may be diagnostic of germinoma. Findings on CT scan suggestive of germinoma include hyperdensity compared to adjacent brain, pituitary stalk enhancement and thickening, and presence of calcification in the pineal region in the pediatric population. | |||
==CT== | |||
*On CT the high cellularity results in a degree to hyperdensity compared to adjacent brain. Usually the mass enhances brightly. | |||
*When in the floor of the third ventricle it is typically seen filling and expanding the infundibular recess and supraoptic recess. | |||
*Imaging may however be normal initially and if the diagnosis is suspected clinically (e.g. idiopathic hypothalamic diabetes insipidus) then close followup is required to identify potentially very subtle abnormal pituitary stalk enhancement and thickening. | |||
*In the paediatric population presence of calcification in the pineal region is a useful marker of an underlying tumour, as no calcification of the pineal is seen in children below the age of 6.5 and in only ~10% of children between 11 and 14 years of age. | |||
==References== | ==References== | ||
{{Reflist|2}} | {{Reflist|2}} | ||
Revision as of 20:47, 9 February 2016
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Germinoma Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Germinoma CT On the Web |
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American Roentgen Ray Society Images of Germinoma CT |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Simrat Sarai, M.D. [2]
Overview
Head and neck CT scan may be diagnostic of germinoma. Findings on CT scan suggestive of germinoma include hyperdensity compared to adjacent brain, pituitary stalk enhancement and thickening, and presence of calcification in the pineal region in the pediatric population.
CT
- On CT the high cellularity results in a degree to hyperdensity compared to adjacent brain. Usually the mass enhances brightly.
- When in the floor of the third ventricle it is typically seen filling and expanding the infundibular recess and supraoptic recess.
- Imaging may however be normal initially and if the diagnosis is suspected clinically (e.g. idiopathic hypothalamic diabetes insipidus) then close followup is required to identify potentially very subtle abnormal pituitary stalk enhancement and thickening.
- In the paediatric population presence of calcification in the pineal region is a useful marker of an underlying tumour, as no calcification of the pineal is seen in children below the age of 6.5 and in only ~10% of children between 11 and 14 years of age.