Mt. Parisi et al., OPTIMIZED DIAGNOSTIC STRATEGY FOR NEUROBLASTOMA IN OPSOCLONUS-MYOCLONUS, The Journal of nuclear medicine, 34(11), 1993, pp. 1922-1926
Infantile myoclonic encephalopathy (opsoclonus-myoclonus or IME) is a
rare clinical syndrome associated with occult neuroblastoma in 20%-50%
of all cases. IME is the initial presentation of neuroblastoma in 1%-
3% of children. Imaging approaches including chest radiography and abd
ominal computed tomography (CT) have been proposed to detect neuroblas
toma in IME. Metaiodobenzylguanidine (MIBG) is highly effective in the
detection of neuroblastoma. These scans can identify both soft-tissue
and skeletal lesions anywhere in the body. Our purpose was to attempt
to determine the best screening method for detection of occult neurob
lastoma in patients with IME. Records of all neuroblastoma patients fr
om 1983 to May 1991 were reviewed. Four cases of IME with neuroblastom
a were identified in which imaging studies included an MIBG scan. All
four patients had positive MIBG scans (100%) while only two had masses
on initial CT (50%). In the three patents initially evaluated by trad
itional methods, the mean time to diagnosis and the mean number of adv
anced radiologic studies were 7.5 mo and 7.3 studies respectively. The
patient screened with MIBG had only cranial and abdominal CT prior to
surgery. Although based on a limited number of patients, results sugg
est that MIBG may prove to be a useful screening procedure in patients
with IME. Traditional imaging modalities can then be directed to eval
uate sites of disease identified by MIBG scans,