A clinical study was carried out on 29 patients who revealed pathological findings in
lingluar segment of the left upper lobe on radiologic examination of the chest. Among
29 cases, 20 cases were female patients, and the most common cause was tuberculosis
(17 cases), and the remainders were bronchiectasis (6 cases), lung cancer (4 cases), and
pneumonia (2 cases).
On fiberoptic bronchoscopic examination, all cases except one showed obstruction or
narrowing of the bronchial lumen, which due inflammations, extraluminal compressions,
or masses.
The lesions in the lingular segment was different from right middle lobe syndrome,
which strongly suggested that not impairment of collateral ventilation in a main
pathological chance of middle lobe syndrome but another mechanism and underlying
causes.
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