Natural History Study of Infants With Adrenal Masses Found on Prenatal and/or Neonatal Imaging

Inclusion Criteria:

   - Sonographically identified adrenal mass meeting one of the following criteria:

      - No greater than 16 mL in volume, if solid

      - No greater than 65 mL if at least 25% cystic and does not cross the midline

   - Disease limited to the adrenal gland

      - No evidence of positive contralateral or ipsilateral lymph nodes or other spread
      outside the adrenal gland by CT scan or MRI

      - No evidence of disease outside the adrenal gland by MIBG scan

      - Negative for tumor cells by bone marrow biopsy, if performed

   - No more than 6 months of age on the date the mass is first identified

   - No prior chemotherapy

   - No prior abdominal surgery