Narrowed esophagus due to external pressure effects
Good day! I am 30 years old. About 4 weeks ago, I underwent a stomach and colonoscopy due to sharp pains in the abdominal area and reflux. No abnormalities were found in the stomach and intestines, but a "constriction of the proximal esophagus" was detected. I do not have difficulty swallowing directly, but I have been struggling with back pain and poor posture all my life. These symptoms are currently recurring frequently. Soon I have to undergo a CT scan to rule out a mediastinal process. Until then, I can only hope that it is nothing serious. However, most internet sources suggest tumors that compress the esophagus from the outside. Are there any experiences here, theoretically, what it could be? Thank you in advance!