RESUMEN
Amiodarone is a widely prescribed antiarrhythmic drug with a relatively high incidence of adverse effects associated with its long-term oral use. Pulmonary toxicity may manifest as organizing pneumonia, which responds well to amiodarone discontinuation and corticosteroid treatment. We present a case of an organizing pneumonia secondary to amiodarone treatment, discuss the diagnostic approach and provide tips for an accurate diagnosis based on imaging findings. A brief literature review is performed.
RESUMEN
Iron overload is a common clinical problem resulting from hereditary hemochromatosis or secondary hemosiderosis (mainly associated with transfusion therapy), being also associated with chronic liver diseases and metabolic disorders. Excess of iron accumulates in organs like the liver, pancreas and heart. Without treatment, patients with iron overload disorders will develop liver cirrhosis, diabetes and cardiomyopathy. Iron quantification is therefore crucial not only for diagnosis of iron overload but also to monitor iron-reducing therapies. Liver iron concentration is considered the surrogate marker of total body iron stores. Because liver biopsy is invasive and prone to high variability and sampling bias, MR imaging has emerged as a non-invasive method and gained wide acceptance, now being considered the standard of care for assessing iron overload. Nevertheless, there are different MR techniques for iron quantification and there is still no consensus about the best technique or postprocessing tool for hepatic iron quantification, with the choice of imaging technique depending mainly on the local expertise as well on the available equipment and software. Because different methods should not be used interchangeably, it is important to choose one method and use the same one when following up patients over time.
