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What is the most likely diagnosis?
Based on characteristic location, age and presentation, neuroblastoma is the definitive diagnosis.
What percentage of opsomyoclonus ("dancing eye-dancing feet") patients, may have neuroblastoma, and vice versa?
50% of patients with opsomyoclonus have neuroblastomas, however only 2% of neuroblastomas actually present with opsomyoclonus
A well-defined mass lesion is seen in the right suprarenal region, in paravertebral location with T2 homogeneous hyperintense signal.