Table 1 Patient and tumor characteristics
From: Particle beam radiation therapy using carbon ions and protons for oligometastatic lung tumors
Characteristics | n |
|---|---|
Number of patients | 47 |
Gender | Â |
  Male | 29 (61.7%) |
  Female | 18 (38.3%) |
Performance status | Â |
  0 | 30 (63.8%) |
  1 | 13 (27.7%) |
  2-3 | 4 (8.5%) |
Primary tumor | Â |
  CRC | 11 (23.4%) |
  NSCLC | 10 (21.3%) |
  Kidney | 7 (14.9%) |
  Head and neck | 4 (8.5%) |
  Others | 15 (31.9%) |
Prior chemotherapy | Â |
  Yes | 31 (66%) |
  No | 16 (34%) |
Presence of extrathoracic disease | Â |
  Yes | 24 (51.1%) |
  No | 23 (48.9%) |
Number of target thoracic metastases | Â |
  1 | 35 (74.4%) |
  2 | 12 (25.6%) |
Tumor diameter | Â |
  <20 mm | 21 (44.7%) |
  ≥20 mm | 26 (55.3%) |
Reason for nonsurgical treatment | Â |
  Refusal of surgery | 29 (61.7%) |
  Medical inoperability |  |
   Pulmonary | 10 (21.3%) |
   Age | 7 (14.9%) |
   Performance status | 1 (2.1%) |