Surgical intervention for pulmonary metastases.

Area of Science:

• Oncology
• Thoracic Surgery
• Cancer Metastasis

Background:

• Pulmonary metastases are the sole site of cancer spread in approximately 20% of autopsy cases.
• Resection of lung metastases is considered for palliative reasons (e.g., pain, hemoptysis) or with curative intent in select patients.

Purpose of the Study:

• To review the current evidence and indications for pulmonary metastasectomy.
• To identify prognostic factors influencing survival after lung resection of metastasis.

Main Methods:

• A selective PubMed database search was conducted for articles published between 2006 and 2011.
• Keywords included "pulmonary metastasectomy," "lung resection of metastasis," and "lung metastasectomy."

Main Results:

• No prospective comparative or randomized controlled trials exist to guide treatment decisions or prove survival benefits.
• Surgical indications depend on primary tumor histology, metastasis characteristics, and predicted lung function post-resection.
• Favorable factors include a long disease-free interval, absence of lymph node involvement, and limited metastases.
• Reported 5-year survival rates vary significantly by primary tumor type, ranging from 29% to 94%.

Conclusions:

• Pulmonary metastasectomy can provide durable disease-free survival for carefully selected patients lacking other treatment alternatives.
• Clinical staging and defined prognostic indicators are essential for patient selection in lung metastasectomy.