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- W3207788181 abstract "TOPIC: Diffuse Lung Disease TYPE: Fellow Case Reports INTRODUCTION: Cigarette smoking is associated with several interstitial lung diseases including desquamative interstitial pneumonia (DIP), respiratory bronchiolitis interstitial lung disease and Pulmonary Langerhan's Cell Histiocytosis. These diseases are known as smoking-related interstitial lung diseases (SR-ILD). Vaping introduced an additional category of SR-ILD known as E-cigarette or vaping associated lung injury (EVALI). We present a case that raised suspicion for concurrent DIP and EVALI in a patient who smoked and vaped. CASE PRESENTATION: A 56 years-old female smoker with a 40-pack-year smoking history presented to the ER with dyspnea and dry cough for two weeks. She had smoked 15 unfiltered self-rolled cigarettes daily but recently switched to packaged cigarettes and vaping in an effort to quit smoking. CT Chest showed ground-glass opacities (GGO) bilaterally (Fig 1). Infectious workup, including sputum culture, was negative. Symptoms improved with antibiotics, steroids, and smoking cessation; repeat CT Chest two months later showed resolution of infiltrates (Fig 2). As symptoms improved, she continued to smoke and vape, presenting with similar symptoms three more times over the following four months requiring hospitalization. Her symptoms responded to steroid treatment and periods of smoking cessation. On her fourth admission, CT chest re-demonstrated bilateral GGO, worse compared to initial imaging (Fig 3). BAL fluid had neutrophilic predominance, pigmented macrophages, and negative cultures. In the setting of recurrent episodes of acute hypoxemic respiratory failure and radiological worsening with re-exposure to smoking and vaping, she was treated for EVALI and DIP with 40 mg of methylprednisolone every eight hours. Her oxygen requirements improved from high flow nasal cannula at FiO2 80% to room air over three days and she was discharged home on a prednisone taper. DISCUSSION: Mortality from DIP ranges from 6-28% while EVALI has independently been associated with nearly 2800 hospitalizations or deaths in a single outbreak. Most cases of EVALI are in smokers and a recent study showed 9.7% of current smokers also vape. Smoking creates an altered pro-inflammatory state of the lung and a secondary insult from toxic aerosolized particles, i.e. vaping, may cause a profound secondary inflammatory response. This case illustrates the importance of screening for a history of vaping in a patient with CT findings suggestive of SR-ILD. As in the present case, DIP and EVALI may be considered steroid-responsive ILDs as well as SR-ILD. CONCLUSIONS: Smokers presenting with respiratory failure and interstitial lung changes should be screened for a history of vaping use. Cessation of both smoking and vaping is crucial in these patients as either may lead to worsening lung injury. Further investigation into dual cases is needed to understand the interplay between smoking-related ILD and EVALI. REFERENCE #1: Carrington, CB et al. Natural history and treated course of usual and desquamative interstitial pneumonia. N Engl J Med. 1978;298:801–809 REFERENCE #2: Villarroel MA, Cha AE, Vahratian A. Electronic cigarette use among U.S. adults, 2018. NCHS Data Brief, no 365. Hyattsville, MD: National Center for Health Statistics. 2020. REFERENCE #3: Kumar, A et al. Current Concepts in Pathogenesis, Diagnosis, and Management of Smoking-Related Interstitial Lung Diseases. Chest. 2018 Aug;154(2):394-408 DISCLOSURES: No relevant relationships by Marilyn Glassberg, source=Web Response No relevant relationships by Nehan Sher, source=Web Response No relevant relationships by Aysha Tandon, source=Web Response" @default.
- W3207788181 created "2021-10-25" @default.
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- W3207788181 date "2021-10-01" @default.
- W3207788181 modified "2023-09-25" @default.
- W3207788181 title "ADDING INSULT TO INJURY: E-CIGARETTE OR VAPING PRODUCT USE-ASSOCIATED LUNG INJURY COMBINED WITH SMOKING-RELATED INTERSTITIAL LUNG DISEASE" @default.
- W3207788181 doi "https://doi.org/10.1016/j.chest.2021.07.1088" @default.
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