[Definitions of oligometastatic disease and new treatment concepts]

Area of Science:

• Oncology
• Radiation Oncology
• Medical Imaging

Background:

• The definition of oligometastatic disease represents an intermediate stage between single metastasis and polymetastatic disease.
• This stage has distinct prognostic implications.
• Understanding and defining these stages is crucial for therapeutic decision-making.

Purpose of the Study:

• To assess the therapeutic impact of clinical definitions of oligometastatic disease.
• To review the literature on the effectiveness of treatments for oligometastatic cancer.

Main Methods:

• Literature review of studies defining and treating oligometastatic disease.
• Analysis of stereotactic irradiation with ablative intent for oligometastatic targets.
• Examination of combined systemic-ablative local treatment approaches.

Main Results:

• Stereotactic irradiation shows an excellent tolerance profile for treating oligometastatic targets.
• Metastatic ablation can prolong progression-free survival and delay the need for systemic therapy changes or symptom onset.
• Potential improvements in survival, quality of life, and healthcare costs were observed.

Conclusions:

• Oligometastatic disease definitions are evolving, offering distinct prognostic insights.
• Stereotactic ablative radiotherapy is a viable treatment option for select oligometastatic cancers.
• Future research focuses on biology-driven and imaging-oriented approaches for personalized treatment guidance.