Surgery is done to remove an ovarian mass and make a diagnosis or for suspicion of ovarian cancer or possible ovarian cancer that has spread to other parts of the tummy. It includes removal of the mass, ovary, or both ovaries with or without hysterectomy (womb, fallopian tubes and cervix). The mass can sometimes be sent for rapid diagnosis to pathology lab (frozen section) to establish a diagnosis to see if it is looking cancerous. If suspicion of cancer then the fatty curtain called the omentum in the tummy will be removed and lymph glands (Pelvic and Para-aortic lymph nodes) will be sampled (to see microscopic spread). Some women may need more extensive surgery than others and this will be discussed with you.
The surgery is done by keyhole operation if there is a small size mass with no spread or by a vertical cut on the tummy if is big or has spread. The operation aims to safely remove the mass, tumour, or cyst, to establish a diagnosis, to remove all tumour possible if it has spread to other organs with no visible tumour left after the operation.
Extensive operation is needed if there is spread outside the cyst or mass which includes removal of omentum, peritoneum (cling film lining the tummy and organs), lymph glands, may have to operate close to, or on the bowel. If the area of bowel affected by cancer must be removed, the remaining sections of the unaffected bowel are joined together if possible. If this is not possible, the bowel will be diverted to open on the surface of the tummy. This is known as a ‘stoma’ and allows the bowel contents to be collected in a bag attached to your tummy. The bag can be removed and emptied. If the doctor thinks there is a possibility of bowel surgery this will be discussed with you. It sometimes involves resection of other involved organs intending to extend your life with not much of a compromise on your quality of life.
Chemotherapy is sometimes used before surgery if there is an extensive disease or after the operation. The intention to use it before is to reduce the volume of cancer and make it feasible to have a less extensive operation with an intention not to leave cancer after the operation. In our institution, we nearly achieve in 90% of the patients. We perform this operation as a team involving other specialists as and when needed. Patients live longer who had no cancer left after surgery.
Cytoreductive Surgery and Hyperthermic Intraperitoneal Chemotherapy (HIPEC)
Cytoreductive Surgery (CRS) defined as the removal of macroscopic abdominal and peritoneal disease, combined with hyperthermic perioperative chemotherapy (HIPEC) is the treatment indicated for ovarian cancer with peritoneal metastases.(Cancers spread to other organs and lining of the abdomen) Chemotherapy is given into the abdomen during surgery is called intraoperative chemotherapy.
HIPEC is used to treat cancers that have spread to the lining of the abdominal cavity, such as those of the appendix, colon, stomach and ovaries. HIPEC is an alternative and innovative method of delivering chemotherapy, which is commonly used to treat many types of cancer. Unlike traditional chemotherapy that is delivered intravenously (through a needle into your vein), HIPEC delivers chemotherapy directly into the abdomen making it a good option for cancers that originated in or have spread to the abdominal cavity.
Patients who have ovarian or advanced peritoneal metastases from ovarian cancer may profit from this strategy but additional evidence should be generated from ongoing collaborative studies at experienced treatment centers.
Recent studies on HIPEC in Ovarian cancer have shown promising results. There are several studies published supporting HIPEC in Ovarian cancer with increased survival. It is a part of national guidance in treating ovarian cancer in some of the countries. We are doing it as a part of a trail and this will contribute to the current evidence.
CRS can take several hours (sometimes up to 10-12 hours). If the surgeons can remove the entire tumour less than a centimeter is left you will be given HIPEC. Heated chemotherapy is put directly in your abdomen while you are in the theatre and left in for 90 minutes. We know that even after the surgeon has removed the entire tumour that can be seen, there may still be tumour cells that are not visible and chemotherapy is used to destroy these. The chemotherapy is heated because heat damages tumour cells more than normal cells and improves the effect of the drug. Circulating the fluid around your abdomen allows it to be filtered which also increases the effectiveness of the treatment. HIPEC destroys cancer cells that are too small to be seen with the naked eye.
Most of the side effects are from having the operation rather than directly having the chemotherapy. There can be a small chance that there could be an inflammation of the pancreas (pancreatitis), bowel leak, or low white cell count. We will carefully watch for all these and treat them as needed.