Subspecialty Clinics: Pulmonary and Critical Care Medicine
Rapidly Growing Mycobacterial Lung Infection in Association With Esophageal Disorders

https://doi.org/10.4065/74.1.45Get rights and content

Esophageal or other swallowing disorders complicated by lipoid pneumonia are reported to be associated with pulmonary infections caused by rapidly growing mycobacteria.4 Herein we describe a 63-year-old woman with achalasia of the esophagus complicated by lung infection with Mycobacterium chelonae and a 47-year-old man in whom long-term ingestion of mineral oil was complicated by lipoid pneumonia and M. fortuitum lung infection. A MEDLINE search of English language publications from 1966 to 1997 revealed 18 cases of lung infections caused by rapidly growing mycobacteria in patients with esophageal disorders. Of these 18 patients and our 2 patients, 11 were men and 9 were women (mean age, 50 years). Achalasia was present in 11 patients, and 6 had lipoid pneumonia without evidence of esophageal disorders. Three patients had lipoid pneumonia caused by lipoid ingestion in the setting of achalasia or another swallowing disorder. In 14 patients, lung infection was caused by M. fortuitum; in 5, M. chelonae; and in 1, a non-M. Jortuitum rapidly growing mycobacterial infection. The most common clinical feature was fever, and the most common roentgenologic abnormality was the presence of unilateral or bilateral and patchy or dense infiltrates. The sputum was the most common source of isolation of rapidly growing mycobacteria. Achalasia and lipoid pneumonia are important risk factors for the development of lung infections caused by rapidly growing mycobacteria. Treatment of the esophageal disease might prevent occurrence of and facilitate recovery from these infections.

Section snippets

Case 1

A 63-year-old woman with achalasia of the esophagus, previously treated with colonic interposition, was admitted to our institution because of fever, dyspnea, anorexia, and bilateral pulmonary infiltrates. Previously, she had been examined and treated at another hospital with intravenous and oral antibiotic therapy, without pronounced response. Past medical history included treated tuberculosis infection, left upper lobectomy for resection of a tuberculous granuloma, hypertension, type 2

Review Of The Literature

We performed a MEDLINE search of English language publications since 1966 to identify reports of pulmonary infections due to rapidly growing mycobacteria The search strategy included reports of patients with swallowing disorders or lipoid pneumonia (or both) and proven pulmonary infection with rapidly growing mycobacteria We included patients in whom repeated sputum cultures (at least three) showed rapidly growing mycobacteria and evidence of lung disease based on clinical symptoms, signs,

Discussion

Eighteen previously reported cases and our two cases fulfilled the aforementioned criteria.2, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 The clinical characteristics are listed in Table 1. The mean age of the 11 men and 9 women was 50 years, and the range was 29 to 75 years (age was not known for 1 patient). Achalasia was the most common esophageal disorder and was present in 11 patients (55%). Six patients (30%) had no pronounced esophageal or swallowing disorder, but they had

Conclusion

In patients with prolonged or refractory lung infection (or both) in the presence of deglutition problems, atypical mycobacteria should be suspected. The most common findings are pulmonary infiltrates on chest roentgenograms and fever. Patients are usually middle-aged, and no sex or smoking status predilection is evident. Underlying lung disease and other chronic conditions are uncommon. M. fortuitum seems to be the most common pathogen. Concomitant therapy for the esophageal disease and

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      Rapidly growing mycobacterial species such as M fortuitum and M chelonae have been isolated in infections in patients with esophageal dysfunction, such as from achalasia, hiatal hernia, stroke, and prior esophagectomy. Chronic aspiration is most likely the mechanism of infection and may be complicated by lipoid pneumonia.20,42 Chest radiograph and CT show unilateral or bilateral patchy nodular or consolidative opacities resembling aspiration.6

    • Mycobacterium fortuitum empyema associated with an indwelling pleural catheter: Case report and review of the literature

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    *

    Current address: Duke University Medical Center, Durham, North Carolina.

    Current address: Carolina Respiratory Specialists, Charlotte, North Carolina.

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