[Analysis of middle lobe-resections of the lung (author's transl)]

The present paper investigates the reasons for 26 resections carried out the diagnosis of the so-called "Middle-lobe-syndrome". In 25 of them the diagnosis could be confirmed by postoperative pathological examinations. The term "Middle-lobe-syndrome" means only a roentgenological findings. Its etiology must be investigated as soon as possible with all diagnostic procedures and too, by operation. This is expecially urgent in men older than 40 years.