An intrathoracic kidney first seen as an opacity at the lung base

A 72-year-old patient was admitted for exploration of an opacity of the lef t base discovered fortuitously on a routine chest x-ray. initial blood test s were normal. Fiberoptic bronchoscopy was normal. Computed tomography (CT) led to the diagnosis of a left kidney which had risen into a retro-cardiac position. Magnetic resonance imaging established the sub-diaphragmatic pos ition of the kidney. Renal excretion was normal on intravenous urography. An ectopic kidney in art intrathoracic position very, uncommon and may, rai se a major challenge when visualized as a mediastinal or pulmonary, opacity . Computed tomography or intravenous urography can provide the diagnosis an d magnetic resonance imaging demonstrates its precise sub-diaphragmatic or supra-diaphragmatic position.