Current investigative modalities for detecting and staging lung cancers: a comprehensive summary

Area of Science:

• Pulmonology
• Radiology
• Oncology

Background:

• Accurate lung cancer diagnosis and staging are crucial for effective treatment.
• Various imaging and biopsy modalities are employed, each with unique advantages and limitations.

Purpose of the Study:

• To compare the benefits and drawbacks of current and emerging diagnostic and staging tools for lung cancer.
• To inform clinical practice and future research directions in lung cancer investigation.

Main Methods:

• Narrative review of literature on imaging techniques: plain film radiography, computed tomography (CT), positron emission tomography-CT (PET-CT), magnetic resonance imaging (MRI), ultrasound.
• Evaluation of newer modalities: image-guided bronchoscopy (IGB), robotic bronchoscopy (RB), and minimally invasive surgical biopsies.

Main Results:

• Chest X-ray is a first-line tool, but CT offers lower mortality in high-risk patients.
• PET-CT is highly sensitive and specific for diagnosing nodules and staging, particularly for curative intent.
• MRI is reserved for distant metastases; ultrasound aids lymph node assessment and tissue sampling (EBUS).
• Robotic bronchoscopy shows potential but needs more research; surgical biopsies are increasingly used.

Conclusions:

• CT and PET-CT are vital for lung cancer diagnosis and staging, especially in curative-intent cases.
• Emerging techniques like robotic bronchoscopy require further validation.
• A multimodal approach, integrating various imaging and biopsy methods, optimizes patient management.