Computertomographische und magnetresonanztomographische Befunde des pilozytischen Astrozytoms
| Autor: | B Glas, G Huber, M Hermes |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Pathology
medicine.medical_specialty medicine.diagnostic_test Pilocytic astrocytoma business.industry Astrocytoma Magnetic resonance imaging medicine.disease Pons Central nervous system disease Cerebellar vermis medicine Radiology Nuclear Medicine and imaging Histopathology Neurofibromatosis business Nuclear medicine |
| Zdroj: | RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren. 166:125-132 |
| ISSN: | 1438-9010 1438-9029 |
| DOI: | 10.1055/s-2007-1015394 |
| Popis: | Purpose In a retrospective study we examined the predilection sites, the CT and MR morphology and the contrast behaviour of intracranial pilocytic astrocytoma (PA) in a large number of patients. Material and methods The study consists of 47 patients (18 male, 29 female, mean age 10.1 years) with histologically proven PA. Results The chief predilection site turned out to be the hypothalamic region (15/47 = 32%). The other regions involved were (in descending order): brain hemispheres 8/47 = 17%; cerebellar vermis 7/47 = 15%, cerebellar hemispheres; thalamic nuclei and pontomedullar region 4/47 = 8.5% each; pineal gland 2/47 = 4%; pons, lamina tecti and optic fascicle 1/47 = 2% each. The PA presented 24/47 = 51% cysts; 7/47 = 15% calcifications; 2/47 = 4% necrosis and 1/47 = 2% perifocal oedema. In three cases (3/47 = 6%) CT and MRI showed no contrast enhancement. Conclusion PA appear in almost all brain regions but there is a clear preference of the hypothalamic region. PA of the hypothalamic region are a special subgroup. They are often associated with neurofibromatosis 1, tend to infiltrate surrounding structures, and to disseminate into the intracranial and spinal subarachnoid space. |
| Databáze: | OpenAIRE |
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