Foreign bodies were located in the left main bronchus in 8 (22.2%) patients, the right main bronchus
in 19 (52.8%), the right distal bronchi in 2 (5.5%), and in the left distal bronchi in 1 (2.8%) patient.
It was found in the right main bronchus
therefore, the tube was withdrawn and replaced again.
The right main bronchus
is at more acute angle (25 degrees) and is 1-2.5cm long with a variable upper lobe bronchus take off which may be anteriorly, posteriorly or laterally or from trachea1.
Computed tomography (CT) revealed consolidation, ground-glass opacity in the right upper and lower lobe, and thickened right main bronchus
wall (Figure 1, panel B).
The stenosis sites were divided into 5 locations: (I) trachea, (II) left main bronchus, (III) right main bronchus
, (IV) right middle bronchus, and (V) lobe bronchus.
 In our study, in six out of the eight bronchial foreign body cases, foreign bodies were found in right main bronchus
which is similar to the observations made by Eren et al  who reported 52% of airway foreign bodies in right main bronchus
Fibreoptic bronchoscopy revealed a necrotic grayish tubular soft-tissue mass in the right main bronchus
completely occluding lumen and slightly projecting into trachea presumed to be malignant [Figure 2].
The majority of the foreign bodies were found to be localized in the right main bronchus
in this study.
For the abnormal models, the airflow simulation works in a model with severe stenosis in the right main bronchus
, a model with COPD , six models with mild or moderate asthma , and four models with left pulmonary artery sling [16, 17] have been reported.
Right main bronchus
had mildly copious amount of mucus and the left main bronchus had moderate mucosal inflammation with mucus stagnation.
Often, these FBs get lodged in the right main bronchus
. This is due to the fact that right main stem bronchus is in line with the trachea.
There is a consensus that the anatomical structure of the right main bronchus
and branches of the bronchial tree make it more susceptible to foreign body aspiration (9).