求翻译：治疗组16例中经腹手术15例(姑息2例),经胸手术1例;而对照组(不愿意作术前化疗或病情不合适经腹手术)20例中经腹手术12例（姑息5例），经胸手术8例。是什么意思？

Treatment group, 16 cases, 15 cases of abdominal surgery (palliative two cases), and transthoracic surgery; the control group (not willing to make preoperative chemotherapy or condition inappropriate by the 20 cases of abdominal surgery) in 12 cases of abdominal surgery (palliative 5 cases), by eigh

treatment groups in 16 cases the abdominal surgery indulgent 2 cases (15 cases), with which the breast enlargement surgery; the control group (1 case was reluctant to make chemotherapy before surgery or illness does not fit in with the abdominal surgery) 20 laws enacted by the abdominal surgery 12 (

In the treatment group 16 examples (appeases 2 examples) after abdomen surgery 15, after chest surgery 1; But the control group (is not willing to make in front of technique chemotherapy or condition not appropriately in 20 examples (appeases 5 examples) after abdomen surgery) after abdomen surgery

16 cases of abdominal surgery in the treatment of group 15 (2), 1 chest surgery cases; and the control group (not willing to preoperative chemotherapy is not suitable or had abdominal surgery) 20 cases of abdominal surgery in 12 cases (5 cases), 8 cases of thoracic surgery.