Figure 10: (10a) A GRE T2*-weighted sagittal image reveals a complex tear of the posterior horn of the medial meniscus, having horizontal (arrows) and longitudinal (arrowhead) components. Complex tears like this are likely to be unstable.igure 6: (6a) A radial tear of the body of the lateral meniscus also appears vertical on sagittal MR images (arrow), though in the case of radial tears, the lesion is oriented perpendicular to the c-shaped fibers of the meniscus.
In brief: See a doctor, urgent. A collapsed lung (pneumothorax) is due to an air leak from the inside of the lung through the covering of the lung, out into the space between the lung and the ribs. The site of the leak has some damage, which will heal itself later.
Symptoms depend on the size of the pneumothorax. In minor cases, you may not realize you have a pneumothorax. In more severe cases, symptoms will develop rapidly and may lead to shock. Symptoms may include: Shortness of breath (dyspnea), which may be mild to severe, depending on how much of the lung is collapsed.