The different features of congenital neuroblastomas: report about the sonographic diagnosis of three cases.

We report on three infants with congenital neuroblastoma. Two clinically asymptomatic infants showed a suprarenal right-sided mass, one infant had a mediastinal tumour with tracheal compression causing immediate postnatal dyspnoea. Diagnosis was established by ultrasonography showing hypoechoic tumours without significant calcifications. The two suprarenal masses were characterised by small cystic areas. Colour coded Doppler sonography revealed perfusion of the tumours distinguishing the suprarenal masses from adrenal haemorrhage. The right-sided mediastinal neuroblastoma showed infiltration of the intervertebral foramina and spinal canal without spinal cord compression. All tumours were surgically removed with favourable clinical outcome.