caa a22 4500 477107249 CHVBK 20180405111557.0 cr unu---uuuuu 170330e19960701xx s 000 0 eng 10.1007/BF01411258 doi (NATIONALLICENCE)springer-10.1007/BF01411258 Cystic meningioma [Elektronische Daten] [M. El-Fiki, Y. El-Henawy, N. Abdel-Rahman] Summary: Meningiomas are usually solid tumours. Cystic changes in meningiomas are rare. These cysts may occur extratumoural, peritumoural or intratumoural. Diagnostic difficulties arise in cases of cystic meningiomas. Nine cases of cystic meningiomas were operated on in the past 6 years at the department of neurosurgery, University of Alexandra. The mean age of patients was 46.2 years. Male to female ratio was 1/2. Less oedema was observed in extratumoural cysts, and more oedema in intratumoural cysts. The fluid contained was dark brown or dirty yellow in intratumoural cysts (type C), xanthochromic in peritumoural cysts surrounded by tumour tissue (Type B), or clear fluid in extratumoural cysts (Type A). Based on these two observations it is proposed that the cyst fluid and peritumoural oedema may represent variable degrees of degeneration or secretion by tumour cells. Pre-operatively diagnostic criteria are presented. Springer-Verlag, 1996 Meningiomas nationallicence cystic degeneration nationallicence El-Fiki M. Department of Neurological Surgery, University of Alexandria, Egypt aut El-Henawy Y. Department of Neurological Surgery, University of Alexandria, Egypt aut Abdel-Rahman N. Department of Neurological Surgery, University of Alexandria, Egypt aut Acta Neurochirurgica Springer-Verlag 138/7(1996-07-01), 811-817 0001-6268 138:7<811 1996 138 701 https://doi.org/10.1007/BF01411258 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01411258 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- El-Fiki M. Department of Neurological Surgery, University of Alexandria, Egypt aut NATIONALLICENCE 700 1- El-Henawy Y. Department of Neurological Surgery, University of Alexandria, Egypt aut NATIONALLICENCE 700 1- Abdel-Rahman N. Department of Neurological Surgery, University of Alexandria, Egypt aut NATIONALLICENCE 773 0- Acta Neurochirurgica Springer-Verlag 138/7(1996-07-01), 811-817 0001-6268 138:7<811 1996 138 701 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer