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Lipid-laden alveolar macrophages, also known as pulmonary foam cells, are cells found in bronchoalveolar lavage (BAL) specimens that consist of macrophages containing deposits of lipids (fats). The lipid content of the macrophages can be demonstrated using a lipid targeting stain like Oil Red O or Nile red. Increased levels of lipid-laden alveolar macrophages are associated with various respiratory conditions, including chronic smoking, gastroesophageal reflux, lipoid pneumonia, fat embolism, pulmonary alveolar proteinosis and pulmonary aspiration. Lipid-laden alveolar macrophages have been reported in cases of vaping-associated pulmonary injury.

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  • Macrófago alveolar cargado de lípidos (es)
  • Lipid-laden alveolar macrophage (en)
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  • Los macrófagos alveolares cargados de lípidos o células espumosas pulmonares,​ son células encontradas en muestras de lavado broncoalverolar que muestran macrófagos conteniendo depósitos de lípidos (grasas).​ El contenido lipídico de los macrófagos puede ser demostrado utilizando una tinción de lípidos como Aceite Rojo O o Nile red.​​​ Los niveles altos de macrófagos alveolares cargados con lípidos están asociados con varias affeciones respiratorias, que incluyen, tabaquismo crónico,​ reflujo gastroesofágico, neumonía lipoidea, embolia grasa,​ proteinosis alveolar pulmonar​​ y aspiración pulmonar.​​ Se han reportado casos de daño pulmonar asociado a cigarrillos electrónicos en los que se han encontrado macrófagos alveolares cargados de lípidos.​​​ (es)
  • Lipid-laden alveolar macrophages, also known as pulmonary foam cells, are cells found in bronchoalveolar lavage (BAL) specimens that consist of macrophages containing deposits of lipids (fats). The lipid content of the macrophages can be demonstrated using a lipid targeting stain like Oil Red O or Nile red. Increased levels of lipid-laden alveolar macrophages are associated with various respiratory conditions, including chronic smoking, gastroesophageal reflux, lipoid pneumonia, fat embolism, pulmonary alveolar proteinosis and pulmonary aspiration. Lipid-laden alveolar macrophages have been reported in cases of vaping-associated pulmonary injury. (en)
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  • Los macrófagos alveolares cargados de lípidos o células espumosas pulmonares,​ son células encontradas en muestras de lavado broncoalverolar que muestran macrófagos conteniendo depósitos de lípidos (grasas).​ El contenido lipídico de los macrófagos puede ser demostrado utilizando una tinción de lípidos como Aceite Rojo O o Nile red.​​​ Los niveles altos de macrófagos alveolares cargados con lípidos están asociados con varias affeciones respiratorias, que incluyen, tabaquismo crónico,​ reflujo gastroesofágico, neumonía lipoidea, embolia grasa,​ proteinosis alveolar pulmonar​​ y aspiración pulmonar.​​ Se han reportado casos de daño pulmonar asociado a cigarrillos electrónicos en los que se han encontrado macrófagos alveolares cargados de lípidos.​​​ El índice de macrófagos cargados de lípidos (LLMI) puede ser calculado contando 100 macrófagos en una muestra de lavado broncoalveolar tratada con una tinción que demuestre lípidos y puntuando cada macrófago de 0 a 4 basado en la cantidad de presente de lípidos en la célula.​​ Una LLMI con puntuación mayor que 100 está considerado positivo para aspiración pulmonar. Aun así, la prueba está limitada por su baja reproducibilidad​ y especificidad para la aspiración pulmonar, ya que estas células están presentes en muchas otras patologías.​ (es)
  • Lipid-laden alveolar macrophages, also known as pulmonary foam cells, are cells found in bronchoalveolar lavage (BAL) specimens that consist of macrophages containing deposits of lipids (fats). The lipid content of the macrophages can be demonstrated using a lipid targeting stain like Oil Red O or Nile red. Increased levels of lipid-laden alveolar macrophages are associated with various respiratory conditions, including chronic smoking, gastroesophageal reflux, lipoid pneumonia, fat embolism, pulmonary alveolar proteinosis and pulmonary aspiration. Lipid-laden alveolar macrophages have been reported in cases of vaping-associated pulmonary injury. The lipid-laden macrophage index (LLMI) can be calculated by counting 100 macrophages in a BAL specimen treated with a lipid stain and scoring each macrophage from 0 to 4 based on the amount of lipids present in the cell. A LLMI score greater than 100 is considered positive for pulmonary aspiration. However, the test is limited by poor reproducibility and low specificity for pulmonary aspiration, as lipid-laden macrophages occur in many respiratory conditions. (en)
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