Risks & Possible Complications
Mediastinal Tumour Surgery
What the published evidence says about risk
This page summarizes the risks of minimally invasive (VATS/robotic) mediastinal tumour surgery in plain language, using figures reported in published studies. This is general information, not your individual risk assessment — Dr. Irshad will review your own risk factors with you directly as part of your consent discussion before surgery. Your specific risk depends heavily on the tumour’s size, location, and whether it involves the phrenic nerve, and whether you have myasthenia gravis.
Risks & possible complications
- Overall complication rate — roughly 12% with a minimally invasive (VATS/robotic) approach, based on a pooled analysis of over 900 patients — notably lower than with open surgery.
- Death — rare, close to 0% in modern minimally invasive series.
- Injury to the nerve controlling your diaphragm (phrenic nerve) — uncommon, roughly 0–7%, depending on how close the tumour sits to the nerve; can affect breathing on that side if it occurs.
- Need to convert to an open incision — roughly 5%, more likely for right-sided tumours than left-sided ones. This is a safety decision, not a failure of the operation.
- Bleeding — uncommon.
- If you have myasthenia gravis: a temporary worsening of muscle weakness after surgery (myasthenic crisis) is a recognized risk, reported in roughly 6–30% of myasthenia patients depending on how severe their disease was beforehand — your team monitors closely for this after surgery.
No large national registry. Unlike lung and esophageal surgery, there is no large national outcomes registry for mediastinal tumour surgery — these figures come from multiple hospital case series and systematic reviews of those series rather than a single national database.
References
- Xu JX, Qian K, Deng Y, et al. Complications of robot-assisted thymectomy: a single-arm meta-analysis and systematic review. Int J Med Robot. 2021;17(6):e2333.
- O'Sullivan KE, Kreaden US, Hebert AE, Eaton D, Redmond KC. A systematic review of robotic versus open and video assisted thoracoscopic surgery (VATS) approaches for thymectomy. Ann Cardiothorac Surg. 2019;8(2):174–93.
- Rowse PG, Roden AC, Corl FM, et al. Minimally invasive thymectomy: the Mayo Clinic experience. Ann Cardiothorac Surg. 2015;4(6):519–26.
- Chen P, Bao F, Pompeo E, Zhang X, Xu T. Summary of the best evidence for the prevention and management of myasthenic crisis after thymectomy. Gland Surg. 2024;13(4):540–51.
Common questions about risk
What is the complication rate for minimally invasive mediastinal tumour surgery?
The overall complication rate is roughly 12% with a minimally invasive (VATS/robotic) approach — notably lower than with open surgery — based on a pooled analysis of over 900 patients.
What is myasthenic crisis and how common is it after thymectomy?
Myasthenic crisis is a temporary worsening of muscle weakness after surgery in patients with myasthenia gravis. It is reported in roughly 6–30% of myasthenia patients, depending on how severe their disease was beforehand.
How often does mediastinal tumour surgery need to convert to an open incision?
Conversion to an open incision occurs in roughly 5% of cases, and is more likely for right-sided tumours than left-sided ones.
This page is general information, not medical advice or a consent form. It does not replace the individualized consent discussion you will have with Dr. Irshad, which accounts for your own health, anatomy, and the specific operation planned. If you are experiencing a medical emergency, call 911 or go to your nearest Emergency Department immediately. Published in compliance with the CPSO Advertising Standards Policy.
Questions about your risk?
Dr. Kashif Irshad — Division of Thoracic Surgery, William Osler Health System, Brampton Civic Hospital. Tel: (905) 458-4520 · Fax: (905) 458-4080 · thoracic@williamoslerhs.ca
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