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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Neurooncol
2015 ; 125
(1
): 133-41
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Methotrexate administration directly into the fourth ventricle in children with
malignant fourth ventricular brain tumors: a pilot clinical trial
#MMPMID26255071
Sandberg DI
; Rytting M
; Zaky W
; Kerr M
; Ketonen L
; Kundu U
; Moore BD
; Yang G
; Hou P
; Sitton C
; Cooper LJ
; Gopalakrishnan V
; Lee DA
; Thall PF
; Khatua S
J Neurooncol
2015[Oct]; 125
(1
): 133-41
PMID26255071
show ga
We hypothesize that chemotherapy can be safely administered directly into the
fourth ventricle to treat recurrent malignant brain tumors in children. For the
first time in humans, methotrexate was infused into the fourth ventricle in
children with recurrent, malignant brain tumors. A catheter was surgically placed
into the fourth ventricle and attached to a ventricular access device.
Cerebrospinal fluid (CSF) flow was confirmed by CINE MRI postoperatively. Each
cycle consisted of 4 consecutive daily methotrexate infusions (2 milligrams).
Disease response was monitored with serial MRI scans and CSF cytologic analysis.
Trough CSF methotrexate levels were sampled. Five patients (3 with
medulloblastoma and 2 with ependymoma) received 18, 18, 12, 9, and 3 cycles,
respectively. There were no serious adverse events or new neurological deficits
attributed to methotrexate. Two additional enrolled patients were withdrawn prior
to planned infusions due to rapid disease progression. Median serum methotrexate
level 4 h after infusion was 0.04 µmol/L. Range was 0.02-0.13 µmol/L. Median
trough CSF methotrexate level 24 h after infusion was 3.18 µmol/L (range
0.53-212.36 µmol/L). All three patients with medulloblastoma had partial response
or stable disease until one patient had progressive disease after cycle 18. Both
patients with ependymoma had progressive disease after 9 and 3 cycles,
respectively. Low-dose methotrexate can be infused into the fourth ventricle
without causing neurological toxicity. Some patients with recurrent
medulloblastoma experience a beneficial anti-tumor effect both within the fourth
ventricle and at distant sites.