Signo de la galleta Oreo®: revisión de la anatomía de un signo clásico radiológico a través de un caso clínico

Pericardial effusions can be identified by basic imaging methods, such as chest X-rays. We report the case of a 34-year-old male who presented with dyspnea and chest pain. On chest X-rays a classic sign described as the “Oreo® cookie” sign was identified, which is highly suggestive of pericardial effusion and extremely useful in medical centers where ultrasound or tomography is not available. We present a brief review of the anatomical explanation of this sign and its confirmatory visualization in tomography.