Pre-exenterative chemotherapy, a novel therapeutic approach for patients with persistent or recurrent cervical cancer

Management of recurrent cervical cancer: a review of the literature

OBJECTIVE

The aim of this narrative review is to update the current knowledge on the treatment of recurrent cervical cancer based on a literature review.

MATERIAL AND METHODS

A web based search in Medline and CancerLit databases has been carried out on recurrent cervical cancer management and treatment. All relevant information has been collected and analyzed, prioritizing randomized clinical trials.

RESULTS

Cervical cancer still represents a significant problem for public health with an annual incidence of about half a million new cases worldwide. Percentages of pelvic recurrences fluctuate from 10% to 74% depending on different risk factors. Accordingly to the literature, it is suggested that chemoradiation treatment (containing cisplatin and/or taxanes) could represent the treatment of choice for locoregional recurrences of cervical cancer after radical surgery. Pelvic exenteration is usually indicated for selected cases of central recurrence of cervical cancer after primary or adjuvant radiation and chemotherapy with bladder and/or rectum infiltration neither extended to the pelvic side walls nor showing any signs of extrapelvic spread of disease. Laterally extended endopelvic resection (LEER) for the treatment of those patients with a locally advanced disease or with a recurrence affecting the pelvic wall has been described.

CONCLUSIONS

The treatment of recurrences of cervical carcinoma consists of surgery, and of radiation and chemotherapy, or the combination of different modalities taking into consideration the type of primary therapy, the site of recurrence, the disease-free interval, the patient symptoms, performance status, and the degree to which any given treatment might be beneficial.

Treatment options in recurrent cervical cancer (Review)

The management of recurrent cervical cancer depends mainly on previous treatment and on the site and extent of recurrence. Concurrent cisplatin-based chemo-radiation is the treatment of choice for patients with pelvic failure after radical hysterectomy alone. However, the safe delivery of high doses of radiotherapy is much more difficult in this clinical setting compared with primary radiotherapy. Pelvic exenteration usually represents the only therapeutic approach with curative intent for women with central pelvic relapse who have previously received irradiation. In a recent series, the 5-year overall survival and operative mortality after pelvic exenteration ranged from 21 to 61% and from 1 to 10%, respectively. Free surgical margins, negative lymph nodes, small tumour size and long disease-free interval were associated with a more favourable prognosis. Currently, pelvic reconstructive procedures (continent urinary conduit, low colorectal anastomosis, vaginal reconstruction with myocutaneous flaps) are strongly recommended after exenteration. Concurrent cisplatin-based chemo-radiation is the treatment of choice for isolated para-aortic lymph node failure, with satisfactory chances of a cure in asymptomatic patients. Chemotherapy is administered with palliative intent to women with distant or loco-regional recurrences not amenable by surgery or radiotherapy. Cisplatin is the most widely used drug, with a response rate of 17-38% and a median overall survival of 6.1-7.1 months. Cisplatin-based combination chemotherapy achieves higher response rates (22-68%) when compared with single-agent cisplatin, but median overall survival is usually less than one year. In a recent Gynecologic Oncology Group (GOG) trial the combination topotecan + cisplatin obtained a significantly longer overall survival than single-agent cisplatin in patients with metastatic or recurrent or persistent cervical cancer. A subsequent GOG study showed a trend in terms of longer overall survival and better quality of life for the doublet cisplatin + paclitaxel vs. the doublets cisplatin + topotecan, cisplatin + vinorelbine, and cisplatin + gemcitabine. Molecularly targeted therapy may represent a novel therapeutic tool, but its use alone or in combination with chemotherapy is still investigational.

Prognostic significance of pathological response after neoadjuvant chemotherapy or chemoradiation for locally advanced cervical carcinoma

Background

Cisplatin-based chemoradiation is the standard of care for locally advanced cervical cancer patients; however, neoadjuvant modalities are currently being tested. Neoadjuvant studies in several tumor types have underscored the prognostic significance of pathological response for survival; however there is a paucity of studies in cervical cancer investigating this issue.

Methods

Four cohorts of patients with locally advanced cervical carcinoma (stages IB2-IIIB); included prospectively in phase II protocols of either neoadjuvant chemotherapy with 1) cisplatin-gemcitabine, 2) oxaliplatin-gemcitabine, 3) carboplatin-paclitaxel or 4) chemoradiation with cisplatin or cisplatin-gemcitabine followed by radical hysterectomy were analyzed for pathological response and survival.

Results

One-hundred and fifty three (86%) of the 178 patients treated within these trials, underwent radical hysterectomy and were analyzed. Overall, the mean age was 44.7 and almost two-thirds were FIGO stage IIB. Pathological response rates were as follows: Complete (pCR) in 60 cases (39.2%), Near-complete (p-Near-CR) in 24 (15.6 %) and partial (pPR) in 69 cases (45.1%). A higher proportion rate of pCR was observed in patients treated with chemoradiotherapy (with cisplatin [19/40, 47.5%]; or with cisplatin-gemcitabine [24/41, 58.5%] compared with patients receiving only chemotherapy, 6/23 (26%), 3/8 (37.5%) and 8/41 (19.5%) for cisplatin-gemcitabine, oxaliplatin-gemcitabine and carboplatin-paclitaxel respectively [p = 0.0001]). A total of 29 relapses (18.9%) were documented. The pathological response was the only factor influencing on relapse, since only 4/60 (6.6%) patients with pCR relapsed, compared with 25/93 (26.8%) patients with viable tumor, either pNear-CR or pPR (p = 0.001). Overall survival was 98.3% in patients with pCR versus 83% for patients with either pNear-CR or pPR (p = 0.009).

Conclusion

Complete pathological response but no Near-complete and partial responses is associated with longer survival in cervical cancer patients treated with neoadjuvant chemotherapy or chemoradiotherapy.