Ultrasound for Neuroblastoma Detection in Children

Role of Ultrasound in Initial Detection

The American College of Radiology recommends ultrasound as the preferred first-line imaging modality for suspected neuroblastoma in young children, especially infants, due to its non-invasive nature and ability to identify abdominal masses 2, 3
Approximately 50% of neuroblastoma patients present with localized or regional disease, and ultrasound can effectively identify the primary abdominal mass in these cases, as stated by the National Comprehensive Cancer Network 1
The National Comprehensive Cancer Network recommends ultrasound for surveillance in high-risk populations, such as children with SMARCB1 mutations, where it is used every 4-6 weeks in infants 0-6 months and every 2-3 months from 6 months to 5 years 2, 3
For children with Costello syndrome and HRAS mutations, the National Comprehensive Cancer Network suggests abdominopelvic ultrasound should begin as soon as the genetic variant is identified and continue until age 10 years for neuroblastoma screening 4

The National Comprehensive Cancer Network requires cross-sectional imaging with MRI or CT for definitive evaluation of soft tissue disease at initial diagnosis, not ultrasound alone, with a strength of evidence based on high-quality clinical trials 1
The combination of imaging studies depends on symptoms and suspected disease sites, with the primary goals being identification of neuroblastoma features, assessment of image-defined risk factors, and evaluation of metastatic disease, as recommended by the National Comprehensive Cancer Network 1

The National Comprehensive Cancer Network states that 123I-MIBG imaging is the gold standard for assessing metastatic disease, with high specificity and sensitivity, and a strength of evidence based on high-quality clinical trials 1, 5
MIBG scan has a sensitivity of 83.3% and specificity of 98.0% for neuroblastoma diagnosis, particularly valuable in opsoclonus-myoclonus-ataxia syndrome, according to the National Comprehensive Cancer Network and Praxis Medical Insights 5

In children presenting with opsoclonus-myoclonus-ataxia syndrome, the American College of Radiology suggests CT chest/abdomen/pelvis with IV contrast or MRI may be helpful for initial diagnosis, though the clinical utility of CT as initial imaging is less clear compared to MIBG scanning 6, 7
For infants <6 months with L1 adrenal tumors ≤3.1 cm (if solid) or ≤5 cm (if at least 25% cystic), the National Comprehensive Cancer Network recommends imaging alone may be sufficient without initial biopsy, with a strength of evidence based on high-quality clinical trials 1