[Rare location of a hydatid cyst- in the upper mediastinum migrating into the spinal channel].

The authors report a rare and difficult case of hydatic cyst. The case was rare due to the location of the hydatic disease in the upper mediastinum and because of the onset of the disease with a complication: a spinal cord compression syndrome produced by the migration of the hydatic cyst into the spinal channel. The case was difficult because of the diagnostic problems--especially to establish the topography of the lesion and surgical management.