1. A 76-year-old woman has had difficulty swallowing solid food for 6 weeks and sometimes regurgitates solid masses without pain. She has lost 6 kg of weight. Preliminary diagnosis is esophageal achalasia.
2. A 36-year-old patient was diagnosed with right-sided pneumothorax. The indicated treatment is drainage of the pleural cavity.
3. A 63-year-old patient was diagnosed with purulent mediastinitis. Diseases that cannot cause this include perforation of the cervical part of the esophagus.