II. Causes
- Retroperitoneal (most common causes of abdominal mass)- Neuroblastoma (typically Adrenal Mass)
- Wilms Tumor (renal tumor)- Typically large but painless at presentation
 
- Lymphoma- Majority of cases (60%) are Non-Hodgkin Lymphoma
 
 
- 
                          Liver
                          - Hepatoblastoma
 
- Gastrointestinal- Meckel's Diverticulum
- Fecal Mass
- Enteric duplication cysts
- Mesenteric cyst
 
- Genitourinary
III. Evaluation
- Abdominal XRay
- 
                          Abdominal Ultrasound
                          - Distinguishes cystic and solid lesions
- Evaluates Hydronephrosis, Renal Cysts, Bladder size
- Identifies Ovarian Mass
 
- Other imaging- Abdominal MRI
- Abdominal CT- See CT-associated Radiation Exposure (avoid if possible)
 
 
