Neural crest tumors: I-123 MIBG imaging in children.
OBJECTIVE
To determine 24- and 48-hour distribution of iodine-123 metaiodobenzylguanidine (MIBG) and to establish an optimized pediatric imaging protocol.


METHODS
Seventy-seven I-123 MIBG scans obtained in 33 children undergoing evaluation for neural crest tumor were reviewed.


RESULTS
Activity in the salivary glands, myocardium, liver, gut, and bladder was demonstrated on almost all scans. Activity was noted in the neck muscles, thyroid gland, and uninvolved adrenal gland in fewer studies. In 20 studies, abnormal uptake was present in the chest or abdomen at 24 and 48 hours, and lesion identification was improved at 48 hours in 12 studies. Detection of skeletal lesions on 14 scans was similar at 24 and 48 hours. Foci of tumor were first detected at I-123 MIBG imaging in nine studies, and in only two patients was tumor involvement initially missed on I-123 MIBG studies.


CONCLUSIONS
Distribution of I-123 MIBG on images in children differs from that in earlier descriptions in adults. Images of the torso at 48 hours after injection are a useful adjunct in detection of lesions.
Paltiel
H J
HJ
Department of Radiology, Children's Hospital Medical Center, Cincinnati, OH 45229-2899.
Gelfand
M J
MJ
Elgazzar
A H
AH
Washburn
L C
LC
Harris
R E
RE
Masters
P R
PR
Golsch
G J
GJ
D019797:3-Iodobenzylguanidine; D000293:Adolescent; D000310:Adrenal Gland Neoplasms / Q000000981:diagnostic imaging*; D002648:Child; D002675:Child, Preschool; D003287:Contrast Media; D005260:Female; D018305:Ganglioneuroblastoma / Q000000981:diagnostic imaging; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007462:Iodobenzenes; D008297:Male; D009447:Neuroblastoma / Q000000981:diagnostic imaging*; D010673:Pheochromocytoma / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging
D003287:Contrast Media; D007462:Iodobenzenes; D019797:3-Iodobenzylguanidine