A case of thread aspiration mimicking cavitary tuberculosis
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Foreign body aspiration (FBA) is an important cause of persistent respiratory problems in childhood [1, 2]. The main foreign bodies inhaled are nuts, seeds, fragments of toys in infant age; sharp, metallic objects such as needles, toothpicks, safety pins in toddlers’ age and early childhood period; and blow dart and darting pin in school-aged children [3, 4, 5, 6]. FBA is diagnosed easily with presentation of typical clinical history of aspiration and atelectasis or hyperlucency on chest radiography. Unusual and misleading cases especially without aspiration history present with asthma like symptoms such as chronic cough and wheezing, recurrent or persistent pulmonary infiltrations, bronchiectasis and atelectasis [7, 8, 9, 10]. This is an example of misleading case, without aspiration history, presented with chronic cough, hemoptysis, persistent pulmonary infiltrations, and cavitary lesion mimicking tuberculosis.

Case presentation
A 12-year-old girl was referred to the pediatric pulmonology department for chronic cough, recurrent pulmonary infections for one year and episodic hemoptysis for the period of last nine months. She had no weight loss and night sweats but the productive cough became persistent and she had multiple bouts of antibiotic therapy with the diagnosis of nasopharyngitis or bacterial pneumonia. The symptoms had become much worse over the period of the last one month before she attended to our hospital with bloody sputum and purulent cough. There was no history of foreign body aspiration and contact with tuberculosis. On examination, there was no respiratory distress but had diminished breath sounds in the right thorax and crackles on the same side. The other systemic examination was normal....