• Wojciech Szafrański, Jarosław Dobielski, Wojciech Papiewski, and Urszula Czechowska.
• Oddział Pulmonologiczny Wojewódzkiego Szpitala Specjalistycznego w Radomiu. w.szaf@interia.pl
• Pneumonol Alergol Pol. 2013 Jan 1; 81 (1): 40-4.

IntroductionThe aspiration of a foreign body is usually combined with acute clinical symptoms requiring immediate medical intervention. Nevertheless, in approximately one third of patients the symptoms of aspiration are less prominent; such a clinical condition is called occult bronchial foreign body (OBFB). The aim of our study was to assess the frequency of OBFB in the pulmonary unit of a district hospital and to evaluate the diagnostic difficulties and treatment modalities in such patients.Material And MethodsThe examined group consisted of patients hospitalized in the Department of Lung Diseases in Radom District Hospital. A retrospective analysis of medical records was preformed.ResultsIn the period 1978-2008 - 12 patients (10 males, 2 females) were hospitalized due to OBFB. The foreign bodies occluded the bronchi over 2 months (3 to 7) in 4 patients. The moment of aspiration was not remembered by 8 patients. Cases of OBFB were rare. In the presented material the frequency was 4 per 10,000 hospitalizations and 8 per 10,000 bronchoscopies. In our region of 600,000 population the index of hospitalization due to OBFB in adults (〉 14 years of age) was 0.07 per 100,000 inhabitants/year. Foreign bodies mainly included bone fragments (5 cases), vegetal remnants - clove of garlic, ear of corn (3 patients), and other food remnants (2 patients). Occasionally other aspirates were found, such as a wooden peg or a piece of plastic. The aspiration took place mostly during meals. The patients developed one or more of the following symptoms: purulent pneumonia (3 cases), pleural empyema (1 case), atelectasis (5 cases), and recurrent bronchitis and pneumonia (2 cases). The foreign body (fragments of plants) was mimicking a bronchial tumour in 4 patients. Fibre optic or rigid bronchoscopy was applied successfully in 11 patients. Only one patient needed surgical intervention.ConclusionOBFB is a rare condition, but has to be taken into consideration as a cause of chest radiological pathology and in patients with chronic and/or recurrent inflammatory disease of the respiratory system.

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