Speaker's Highlight

• Don Sin University of British Columbia, St. Paul Hospital (Canada)
  Kenneth R. Chapman Toronto General Hospital Research Institute (Canada)
• Parameswaran Nair McMaster University (Canada)
  Carolyn Calfee UCSF (U.S.A.)
• Gregory P. Downey University of Colorado School of Medicine (U.S.A.)
  David A. Schwartz University of Colorado School of Medicine (U.S.A.)
• Neil Schluger Tuberculosis Control Branch, California Department of Public Health (U.S.A.)
  Nick Kim Critical Care & Sleep Medicine, University of California San Diego (U.S.A.)
• Nicola Hananiah Baylor College of Medicine (U.S.A.)
  Jae-Joon Yim Seoul National University College of Medicine (Republic of Korea)
• Koichiro Asano Tokai University School of Medicine (Japan)
  Diahn-Warng Perng Taipei Veterans General Hospital (Taiwan)
• Konstantinos Kostikas University of Ioannina (Greece)
  Karin Klooster University Medical Center Groningen (Kingdom of the Netherlands)

• Surgical Management of Pulmonary Metastases From Colorectal Cancer

  Pulmonary metastases can develop when colorectal cancer cells travel through the bloodstream and establish deposits in the lungs. Finding lesions in the chest does not automatically mean that surgery is appropriate, but selected patients may achieve meaningful disease control through pulmonary metastasectomy, often combined with modern systemic treatment.

  The decision depends on the number, size and position of lung nodules, the status of the primary bowel cancer, the presence of disease elsewhere and the patient’s general health. High-quality imaging and discussion by a multidisciplinary team are essential before a treatment plan is chosen.

  In Australia, care may involve a colorectal surgeon, thoracic surgeon, medical oncologist, respiratory physician, radiologist and specialist nurse. Patients from regional areas may travel to Sydney, Melbourne, Brisbane, Perth or Adelaide for assessment, while public and private hospitals can offer different waiting times, technologies and out-of-pocket costs.

  Treatment approach	Typical role	Main advantages	Important limitations
  Pulmonary metastasectomy	Selected, limited lung disease	May remove all visible thoracic tumour	Requires adequate lung reserve and resectable disease
  Systemic chemotherapy	Microscopic or widespread disease	Treats cancer throughout the body	Side effects and possible resistance
  Ablation, including microwave or radiofrequency treatment	Small, accessible lesions	Less invasive than open surgery	Not suitable for every size or location
  Stereotactic body radiotherapy	Local control when surgery is unsuitable	Precise, non-surgical treatment	Lung toxicity and limited suitability for multiple lesions
  Active surveillance	Very slow-growing or uncertain nodules	Avoids immediate treatment	Requires reliable, repeated imaging

  When Surgery Is Considered

  Surgery is most often considered when all visible lung metastases can be removed or treated while leaving enough functioning lung behind. A limited number of nodules is favourable, but the decision is not based on a simple numerical cut-off. A patient with several deposits confined to one lung may be a better candidate than someone with one nodule and aggressive disease elsewhere.

  The primary colorectal tumour should usually be controlled, and liver, bone or peritoneal metastases need careful assessment. In some cases, lung surgery follows chemotherapy to test whether the cancer remains stable. A long interval between treatment of the bowel cancer and appearance of lung disease can also support a more favourable outlook, although it is only one factor.

  Staging And Patient Selection

  Thin-slice CT of the chest is central to planning. PET-CT may help identify disease outside the lungs, while MRI or other scans can assess the liver and pelvis when indicated. Colonoscopy, tumour markers such as CEA and molecular testing may add useful information, but no single result determines operability.

  The team also reviews breathing tests, heart health, kidney function, medication use and previous treatments. Frailty, diabetes, obesity and smoking history can affect recovery. A thoracic surgeon may recommend wedge resection, segmentectomy or, less commonly, lobectomy according to the nodule’s location and the amount of healthy lung that must be preserved.

  Surgical Techniques And Alternatives

  Video-assisted thoracoscopic surgery and robotic techniques can reduce incision size, pain and hospital stay in suitable cases. Open thoracotomy may still be recommended when multiple lesions require careful manual examination or when deposits are positioned in a technically difficult area. The aim is complete removal with an adequate margin while avoiding unnecessary loss of lung tissue.

  Local treatments can be useful when surgery would leave too little respiratory reserve or when a patient has significant medical problems. Stereotactic radiotherapy delivers focused radiation over a small number of sessions, whereas thermal ablation uses heat to destroy selected tumours. These approaches require detailed review of lesion size, distance from major airways and blood vessels, and previous radiation exposure.

  Chemotherapy And Treatment Timing

  Systemic therapy may be given before surgery to reduce tumour burden, reveal treatment response and address undetected disease. Common regimens for advanced colorectal cancer include fluoropyrimidine-based combinations, with targeted medicines selected according to molecular results such as RAS, BRAF and mismatch-repair status.

  The interval between chemotherapy, immunotherapy or targeted therapy and an operation must be planned carefully. Some medicines affect wound healing, blood counts or immune function. A stable scan is encouraging, but progression during treatment may indicate that lung resection alone will not control the wider cancer. The final plan should balance local control with the need to treat microscopic disease throughout the body.

  Recovery, Risks And Follow-Up

  After a minimally invasive procedure, many patients return home within several days, although recovery varies. Open surgery can require a longer hospital stay and more gradual return to work, driving and exercise. Pain relief, breathing exercises and early mobilisation help reduce complications such as infection, mucus retention and blood clots.

  Possible problems include prolonged air leak, bleeding, pneumonia, irregular heart rhythm and reduced lung function. Recurrence remains possible even after complete removal, so follow-up commonly includes regular CT scans, clinical review and tumour-marker testing. New breathlessness, chest pain, fever or coughing blood requires prompt medical attention.

  During recovery, financial stress can affect wellbeing, particularly when travel and time away from work are involved. Hospital social workers and financial counsellors can help patients understand expenses; unrelated entertainment content such as online casino material should never be treated as medical or financial guidance.

  The Australian Care Pathway

  Australian patients are usually discussed at a multidisciplinary meeting, with referrals moving between colorectal and thoracic services. Medicare may cover care in the public system, while private treatment can involve specialist, hospital, anaesthetic and imaging gaps. Asking for an itemised estimate before treatment can clarify likely costs.

  People living outside metropolitan centres may need to organise flights, accommodation and follow-up through a regional cancer service. Telehealth can support some appointments, but surgical examination, lung-function testing and treatment planning may still require travel. In states such as Queensland and Western Australia, distance can be a substantial practical consideration.

  Patients should ask how pathology will be reviewed, whether the operation is performed through keyhole or open surgery, and what alternatives are available locally. Australian hospitals may also provide culturally safe care, interpreters and Aboriginal and Torres Strait Islander liaison services. These supports are important when treatment involves extended time away from home and family.

  Practical Priorities For Treatment Planning

  • Confirm whether all known disease is technically removable or treatable.
  • Ask which scans are needed before the multidisciplinary meeting.
  • Review molecular test results and how they influence drug treatment.
  • Discuss expected lung function, hospital stay and return to normal activities.
  • Obtain a clear estimate of public-system or private-system costs.
  • Arrange accommodation, transport and support if travelling from a regional area.
  • Keep scheduled imaging and report new respiratory symptoms promptly.

  Pulmonary metastasectomy is a carefully selected treatment rather than an automatic next step after colorectal cancer spreads to the lungs. The strongest plan combines accurate staging, realistic assessment of lung reserve, appropriate systemic therapy and coordinated follow-up. Patients should remember that the goal is to control the whole cancer while preserving the best possible quality of life.

  Richard Russell Nuffield Department of Clinical Medicine, University of Oxford (United Kingdom)
• Mona Bafadhel King’s College London (United Kingdom)
  David Jackson Guy’s and St Thomas’ Hospital, King’s College London (United Kingdom)
• James Chalmers University of Dundee (United Kingdom)
  David Price University of Aberdeen (United Kingdom)