Successful treatment of platinum refractory ovarian clear cell carcinoma with secondary cytoreductive surgery and implantable transponder placement to facilitate targeted volumetric arc radiation therapy

ObjectiveComplete tumor resection is considered essential in the management of patients with ovarian clear-cell carcinoma. There is a debate regarding whether patients with recurrent ovarian clear-cell carcinoma benefit from secondary cytoreductive surgery.MethodsDetails of patients with clear-cell carcinoma were collected by the Tokai Ovarian Tumor Study Group (Nagoya University Hospital and 13 affiliated institutions) and evaluated between January 1990 and December 2015. Histology was confirmed after central pathological review. The primary endpoint of the study was disease-free survival after secondary cytoreductive surgery. Distributions of events were evaluated using the χ2 test. Survival analysis was based on the Kaplan-Meier method. Survival curves were compared using the log-rank test. A value of p<0.05 was considered significant.ResultsA total of 169 patients who underwent secondary cytoreductive surgery (N=25) or medical management (N=144) for recurrent clear-cell carcinoma were collected. The median age for patients undergoing secondary cytoreductive surgery was 50 years (range 35–66). Overall, 18 patients had complete resection. In patients who underwent secondary cytoreductive surgery, the median disease-free and post-recurrence survival periods were 10.9 months and 21.2 months, respectively. Moreover, among 18 patients who underwent complete resection, seven showed no evidence of disease during the observation periods. The median post-recurrence survival periods of patients with complete or incomplete resection were 30.1 months and 10.4 months, respectively (p=0.002). On stratification by the recurrence site, patients with intraperitoneal recurrence showed poorer post-recurrence survival than those with recurrence at other sites (p=0.016). However, comparison between the secondary cytoreductive surgery group versus the medical management group showed there was no difference in post-recurrence survival, even when considering complete tumor resection (p=0.114).ConclusionPatients with intraperitoneal recurrence or incomplete tumor resection had the worst survival after secondary cytoreductive surgery.

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Risk of second malignancy in patients with ovarian clear cell carcinoma

International Journal of Gynecological Cancer ◽

10.1136/ijgc-2020-001946 ◽

2020 ◽

pp. ijgc-2020-001946

Author(s):

Julie My Van Nguyen ◽

Danielle Vicus ◽

Sharon Nofech-Mozes ◽

Lilian T Gien ◽

Marcus Q Bernardini ◽

...

Keyword(s):

Radiation Therapy ◽

Cell Carcinoma ◽

Clear Cell ◽

Clear Cell Carcinoma ◽

Second Primary ◽

Ovarian Clear Cell Carcinoma ◽

Second Primary Malignancy ◽

Primary Malignancy ◽

Increased Risk ◽

Second Primary Malignancies

ObjectiveOvarian clear cell carcinoma has unique clinical and molecular features compared with other epithelial ovarian cancer histologies. Our objective was to describe the incidence of second primary malignancy in patients with ovarian clear cell carcinoma.MethodsRetrospective cohort study of patients with ovarian clear cell carcinoma at two tertiary academic centers in Toronto, Canada between May 1995 and June 2017. Demographic, histopathologic, treatment, and survival details were obtained from chart review and a provincial cancer registry. We excluded patients with histologies other than pure ovarian clear cell carcinoma (such as mixed clear cell histology), and those who did not have their post-operative follow-up at these institutions.ResultsOf 209 patients with ovarian clear cell carcinoma, 54 patients developed a second primary malignancy (25.8%), of whom six developed two second primary malignancies. Second primary malignancies included: breast (13), skin (9), gastrointestinal tract (9), other gynecologic malignancies (8), thyroid (6), lymphoma (3), head and neck (4), urologic (4), and lung (4). Eighteen second primary malignancies occurred before the index ovarian clear cell carcinoma, 35 after ovarian clear cell carcinoma, and 7 were diagnosed concurrently. Two patients with second primary malignancies were diagnosed with Lynch syndrome. Smoking and radiation therapy were associated with an increased risk of second primary malignancy on multivariable analysis (OR 3.69, 95% CI 1.54 to 9.07, p=0.004; OR 4.39, 95% CI 1.88 to 10.6, p=0.0008, respectively). However, for patients developing second primary malignancies after ovarian clear cell carcinoma, radiation therapy was not found to be a significant risk factor (p=0.17). There was no significant difference in progression-free survival (p=0.85) or overall survival (p=0.38) between those with second primary malignancy and those without.ConclusionPatients with ovarian clear cell carcinoma are at increased risk of second primary malignancies, most frequently non-Lynch related. A subset of patients with ovarian clear cell carcinoma may harbor mutations rendering them susceptible to second primary malignancies. Our results may have implications for counseling and consideration for second primary malignancy screening.

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