Pediatric Abdominal Mass Diagnosis and Management

Clinical Presentation and Diagnosis

The American College of Radiology recommends ultrasonography as the optimal initial screening tool for pediatric abdominal masses due to its wide availability, lack of ionizing radiation, and high sensitivity for detecting masses 1, 2
The National Comprehensive Cancer Network suggests that abdominal pain or swelling, nausea/vomiting, constipation, and painless lymphadenopathy are common presentations of lymphomas, with a strength of evidence of high 3
Elevated alpha-fetoprotein (AFP) levels are associated with hepatoblastoma and germ cell tumors, and the American College of Radiology recommends using age-specific reference ranges for interpretation, with a strength of evidence of high 1, 2
The Journal of the National Comprehensive Cancer Network recommends bone marrow aspirate and biopsy for leukemia diagnosis and lymphoma staging, with a strength of evidence of high 3, 4

The American College of Radiology recommends MRI without and with IV contrast for further characterization of indeterminate ultrasound findings, with a strength of evidence of high 1, 2
The National Comprehensive Cancer Network suggests that CT with IV contrast may be used when MRI is unavailable or contraindicated, with a strength of evidence of moderate 1, 2
The Journal of the National Comprehensive Cancer Network recommends chest imaging (CT chest preferred) for staging lymphomas and metastatic disease, with a strength of evidence of high 3

The National Comprehensive Cancer Network recommends that all pediatric patients with suspected malignant abdominal masses should be treated at specialized cancer centers with expertise in pediatric oncology, with a strength of evidence of high 3, 4
The American College of Radiology suggests that nephron-sparing surgery is recommended whenever possible in syndromic Wilms tumor, with a strength of evidence of high 1, 2
The Journal of the National Comprehensive Cancer Network recommends surveillance protocols for high-risk syndromes, including abdominal ultrasound and AFP monitoring, with a strength of evidence of high 1, 2

The National Comprehensive Cancer Network recommends that oncologic emergencies, such as tumor lysis syndrome and respiratory compromise, require immediate recognition and management, with a strength of evidence of high 3
The American College of Radiology suggests that treatment may need to begin before definitive diagnosis in critically ill patients, with a strength of evidence of moderate 3

The National Comprehensive Cancer Network recommends abdominal ultrasound surveillance every 3 months from birth through age 4 years for Beckwith-Wiedemann syndrome and isolated hemihypertrophy, with a strength of evidence of high 1, 2
The Journal of the National Comprehensive Cancer Network suggests that pelvic ultrasound surveillance is recommended annually or semiannually throughout childhood and adulthood for DICER1 syndrome, with a strength of evidence of moderate 5