Finding Effective Treatment For Ovarian Cancer
- A woman, 70, who experienced abdominal pains she attributed to strenuous yard work, was later revealed to have advanced ovarian cancer. She underwent chemotherapy followed by surgery and a PARP Inhibitor to get the cancer under control, and now she has “no evidence of disease.”
- Ovarian cancer has a high rate of recurrence: nearly 1 in 4 early-stage cases and over 80% of advanced cases, according to the Gland Surgery journal.
- After initial treatment, doctors may recommend maintenance therapy to delay recurrence and extend remission.
- Two common maintenance options include PARP inhibitors, which block cancer cells from repairing themselves, and Bevacizumab (Avastin), which cuts off tumors from the blood supply they need to grow.
- Genetic testing, which is a simple blood test, allows doctors to learn about your cancer risk and details about your tumor at the molecular level. It plays a key role in tailoring maintenance treatments, helping doctors choose the most effective option for each patient
- Many different genetic changes, or mutations, are associated with ovarian cancer. Among the most common are the BRCA set of genes, BRCA 1 and 2. Homologous recombination deficiency (HRD) is a genetic factor that sometimes affects women with BRCA mutations.
Donati experienced persistent pelvic pain, nausea, and a decreased appetite. As it lingered, she and her husband thought seeing a doctor was the next best approach, and in doing so, some initial diagnoses were ruled out, including a urinary tract infection. However, a CT scan helped reveal what was really going on inside: Advanced ovarian cancer.
Read MoreWATCH: Spotting Ovarian Cancer Symptoms
The symptoms of ovarian cancer may include the following, according to SurvivorNet experts.
- A feeling of bloating or fullness
- Pain in the pelvis or abdomen
- Nausea
- Vomiting
- Changes in bowel habits
Donati’s testing also revealed that she is a carrier of the BRCA gene mutation.
WATCH: Understanding the BRCA Mutation
Several genetic changes or mutations exist that are associated with ovarian cancer. The BRCA set of genes, BRCA 1 and 2, is among the most common.
The BRCA1 and BRCA2 gene mutations typically help regulate cell growth, but when mutated, they fail to control unchecked tissue expansion, increasing the risk of breast, ovarian, and other cancers.
Since learning she is a carrier of this gene, Donati has made it her business to get all women close to her tested to learn their cancer risk.
“It’s just not common. It’s not known. I want people to be aware of it. Talk to their gynecologists about it. I had to tell all my sisters and my nieces about it so that then, they could watch for these symptoms,” Donati told the Post-Gazette.
Since Donati’s cancer was stage 4 and had spread throughout her abdomen in a pattern called carcinomatosis, surgery was initially ruled out. Instead, Donati began chemotherapy, which produced a “phenomenal response,” according to her doctor. Her tumors shrank enough to allow for a successful hysterectomy, a procedure that removes part or all of the uterus (or womb), often along with the cervix. She later completed additional chemo and began a two-year course of PARP inhibitors—a type of targeted therapy designed to block DNA repair in cancer cells that is especially effective for patients with BRCA mutations like hers.
WATCH: How do PARP Inhibitors Treat Ovarian Cancer?
Since undergoing treatment, Donati reportedly has “no evidence of disease,” meaning her treatment was highly effective. She still receives regular check-ups to monitor the cancer since ovarian cancer has a tendency to come back after a period of time in a process called recurrence.
Helping Patients Understand Treatment Options for Ovarian Cancer
Genetic Testing and Ovarian Cancer
Genetic testing—analyzing a patient’s DNA or biopsy tissue—can reveal critical insights about cancer: how it forms, how it behaves, and how best to treat it.
“There are certain cancer-causing genes that can be passed down from generation to generation,” explains Dr. Derrick Haslem, the director of medical oncology at Intermountain Healthcare in Salt Lake City.
As researchers uncover more about these inherited mutations, they’re not only pinpointing who might be most at risk—they’re also refining how cancers are detected and treated.
When it comes to ovarian cancer, this information is especially vital.
WATCH: What genetic testing reveals about your cancer?
“There are a lot of mutations that put people at a higher risk for ovarian cancer,” says Dr. Haslem. That’s why your medical team asks about your family history—because genetic red flags can run in families. “If you have a family history of ovarian cancer or breast cancer, that’s a really important thing to bring up with your healthcare provider.”
Mutations in the BRCA1 and BRCA2 genes are among the most common genetic links to ovarian cancer. Another factor, homologous recombination deficiency (HRD), can occur in women with BRCA mutations and further disrupts the cells’ ability to repair their DNA.
If you do have a strong family history, your doctor may recommend testing for BRCA mutations or other inherited syndromes like Lynch syndrome, which can also increase risk for ovarian, colorectal, and breast cancers.
Sometimes, testing positive for a high-risk mutation may lead to conversations about preventive steps. “If you were tested and you had that gene, then somebody might talk to you about prophylactic surgery to remove the ovaries and fallopian tubes,” says Dr. Haslem. This kind of preventive surgery can significantly reduce future cancer risk in those genetically predisposed.
Beyond risk assessment, genetic findings also guide treatment. “Certain chemotherapies and targeted therapies are much more effective in those types of cases,” Dr. Haslem adds. For example, PARP inhibitors—designed to block DNA repair in cancer cells—have shown strong results in patients with BRCA mutations and HRD.
Ultimately, genetic testing isn’t just about knowing your risk—it’s a tool that helps tailor treatment and potentially saves lives.
Ovarian Cancer Recurrence and Treatments to Help
Ovarian cancer recurrence happens in “almost 25 percent of cases with early-stage diseases and in more than 80 percent with more advanced stages,” according to research published in Gland Surgery medical journal. With recurrence a strong possibility for this disease, especially in the later stages of ovarian cancer, certain drug treatments to deal with it are giving many women hope.
Ovarian cancer is sub-categorized into two groups.
- Platinum-Sensitive Ovarian Cancer: Your cancer does not return for more than six months after treatment with platinum-based chemotherapies, like carboplatin and cisplatin.
- Platinum-Resistant Ovarian Cancer: Your cancer returns within six months of treatment with platinum-based chemotherapies, like carboplatin and cisplatin.
“The mechanism that causes platinum resistance will cause someone to be resistant to other chemotherapies, as well. That’s why we’re looking for what we call targeted therapies – precision medicine,” Dr. Noelle Cloven from Texas Oncology-Fort Worth Cancer Center explained.
RELATED: Recurrent Ovarian Cancer Treatment: Is Your Disease “Platinum-Sensitive”?
Targeted therapies or precision medicine specifically target the proteins controlling cancer cells’ growth, division, and spread.
Maintenance Therapy for Ovarian Cancer
Maintenance therapy plays a critical role in helping ovarian cancer patients stay in remission after completing their initial treatment, which often includes surgery and chemotherapy.
“Maintenance therapy is continued treatment after the patient finishes their initial treatment,” explains Dr. Alpa Nick, a gynecologic oncologist with Tennessee Oncology in Nashville.
WATCH: PARP inhibitors are now options as part of ovarian cancer treatment for a growing number of women.
One common form of maintenance therapy is a daily oral medication known as a PARP inhibitor, which works by preventing cancer cells from repairing their DNA.
“The biggest question is: How do you choose between bevacizumab (brand name, Avastin) or a PARP inhibitor for maintenance therapy?” Dr. Nick says.
Both are effective options, but they take very different approaches. While PARP inhibitors target cancer cells’ internal repair systems, Avastin works externally by blocking new blood vessel growth, essentially starving tumors of the needed nourishment.
Genetic testing is key to determining which treatment is most effective. “When patients have their surgery, we can test their tumor to decide if their tumor has a homologous recombination deficiency (HRD),” says Dr. Nick. If HRD is present, patients are more likely to benefit from PARP inhibitors.
Some women may be candidates for a combination approach. The Food and Drug Administration (FDA) has approved Avastin in combination with olaparib (brand name Lynparza) for women with HRD-positive tumors who respond to platinum-based chemotherapy.
This pairing increased progression-free survival in clinical trials from 17 to 37 months. “A patient really has to make a decision upfront, or near the beginning of their treatment, that they want bevacizumab maintenance treatment because they’ll have it with their primary chemotherapy,” adds Dr. Nick.
American Society of Clinical Oncology (ASCO) guidelines now recommend that PARP inhibitors be offered to women newly diagnosed with stage III or IV ovarian cancer, regardless of their genetic status, if they’ve responded well to chemotherapy.
Meanwhile, another breakthrough therapy is offering new hope for patients with platinum-resistant ovarian cancer: Elahere (mirvetuximab). This targeted treatment is designed for women who test positive for high levels of folate receptor-alpha (FRα), a molecular marker found on some ovarian cancer cells.
“What that means is that the antibody part of the drug conjugate binds to the folate receptor on the tumor cells, and then that gets taken up into the tumor cell,” says Dr. Lyons.
“And then the drug that is conjugated with is the part that actually kills the tumor cells, by affecting the tumor cells’ ability to divide.” Often described as “biological missiles,” these antibody-drug conjugates are ushering in a new age of precision therapy.
Ovarian Cancer Recurrence
When cancer returns, it is referred to as recurrence. It often occurs because some cancer cells are left behind after treatment. Those cells grow over time and are eventually detected in follow-up scans received by patients in remission.
Ovarian cancer patients faced with a recurrence will likely need to restart chemotherapy or consider another surgical procedure.
WATCH: Ovarian cancer recurrence.
The type of treatment recommended for recurrence can depend on several factors:
- The period within which the cancer recurred
- The kind of chemotherapy the woman underwent in the past
- Side effects that came as a result of past treatments
- The length of time between the last treatment the woman underwent and the recurrence
- The specific mutations and molecular features of your cancer
If a woman’s time between remission and recurrence is more than six months, then the ovarian cancer is categorized as “platinum-sensitive” (that is, responsive to a platinum-based chemotherapy treatment), and that patient will be treated with chemotherapy and another platinum-based drug.
If the recurrence time happens less than six months into remission, the ovarian cancer is classified as “platinum-resistant.” At that point, women are usually treated with another type of chemotherapy and encouraged to enter into a clinical trial. Alternatively, women might be platinum-refractory, which refers to a disease that grows while the patient is on chemotherapy and has a particularly poor prognosis.
Determining the probability that a woman’s cancer will recur depends on the stage at which they were initially diagnosed. According to most data:
- Women with stage 1 ovarian cancer have a 10 percent chance of recurrence.
- Women in stage 2 have a 30 percent chance of recurrence.
- Women in stage 3 have a 70 to 90 percent chance of recurrence.
- Women in stage 4 have a 90 to 95 percent chance of recurrence.
WATCH: Clinical trials can be life-saving.
Clinical trials are an option for women facing ovarian cancer with a high probability of recurrence. If you fall into this category, ask your doctor about possible clinical trial eligibility. Clinical trials help doctors better understand cancer and discover more effective treatment methods. They also allow patients to try a treatment before it’s approved by the U.S. Food and Drug Administration (FDA), which can potentially be life-changing.
Questions for Your Doctor
If you have been diagnosed with ovarian cancer and need guidance to further educate yourself on the disease and treatment, consider these questions for your doctor.
- What type of ovarian cancer do I have?
- What stage is my cancer in?
- Do you recommend I get genetic testing for any gene mutations, such as the BRCA gene mutation?
- What initial treatment options do you recommend?
- What are the possible side effects of the recommended treatment, and how can they be coped with?
- Will insurance help cover my recommended treatment?
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