The apical posterior segment of the upper lobe of the left lung is in the upper part of the left lung, which from the body position is located in the upper part of the scapula. The left lung is located on the left side of the thoracic cavity, and the oblique fissure of the left lung starts from the posterior margin of the lung about 6 cm below the lung tip, slants forward and downward, and passes through the highest point of the lower margin of the lung to divide the left lung into the upper and lower lobes. The upper lobe of the upper lobe of the left lung is divided into the intrinsic upper lobe and the lingual lobe. The intrinsic upper lobe is further divided into an anterior segment and a postapical segment, and the lingual lobe is divided into an upper lingual segment and a lower lingual segment. The posterior apical segment is located in the upper part of the scapula from the body surface. Found that there is a certain possibility of disease in the apical posterior segment of the upper lobe of the left lung, you need to go to the hospital in a timely manner, to clarify the diagnosis and treatment options, under the guidance of the doctor to use drugs, avoid self-medication.