Erdafitinib in BCG-treated high-risk non-muscle-invasive bladder cancer

BACKGROUND

Treatment options are limited for patients with high-risk non-muscle-invasive bladder cancer (NMIBC) with disease recurrence after bacillus Calmette-Guérin (BCG) treatment and who are ineligible for/refuse radical cystectomy. FGFR alterations are commonly detected in NMIBC. We evaluated the activity of oral erdafitinib, a selective pan-fibroblast growth factor receptor (FGFR) tyrosine kinase inhibitor, versus intravesical chemotherapy in patients with high-risk NMIBC and select FGFR3/2 alterations following recurrence after BCG treatment.

PATIENTS AND METHODS

Patients aged ≥18 years with recurrent, BCG-treated, papillary-only high-risk NMIBC (high-grade Ta/T1) and select FGFR alterations refusing or ineligible for radical cystectomy were randomized to 6 mg daily oral erdafitinib or investigator's choice of intravesical chemotherapy (mitomycin C or gemcitabine). The primary endpoint was recurrence-free survival (RFS). The key secondary endpoint was safety.

RESULTS

Study enrollment was discontinued due to slow accrual. Seventy-three patients were randomized 2 : 1 to erdafitinib (n = 49) and chemotherapy (n = 24). Median follow-up for RFS was 13.4 months for both groups. Median RFS was not reached for erdafitinib [95% confidence interval (CI) 16.9 months-not estimable] and was 11.6 months (95% CI 6.4-20.1 months) for chemotherapy, with an estimated hazard ratio of 0.28 (95% CI 0.1-0.6; nominal P value = 0.0008). In this population, safety results were generally consistent with known profiles for erdafitinib and chemotherapy.

CONCLUSIONS

Erdafitinib prolonged RFS compared with intravesical chemotherapy in patients with papillary-only, high-risk NMIBC harboring FGFR alterations who had disease recurrence after BCG therapy and refused or were ineligible for radical cystectomy.

Radical metastasectomy followed by sorafenib versus observation in patients withclear cell renal cell carcinoma: extended follow -up of efficacy results from the randomized phase II RESORT trial

Background: The RESORT trial showed no longer relapse free survival (RFS) with sorafenib following radical metastasectomy in metastatic renal cell carcinoma. We present the updated 42-month follow-up data.Methods: The phase II RESORT trial randomized patients to sorafenib or observation within 12 weeks from surgery. RFS was the primary endpoint.Results: We analyzed 68 patients (32 in sorafenib and 36 in the observation arm), randomized between November 2012 and November 2017. Eighty-one percent in the sorafenib arm and 80% in the observation arm had one metastasis . At a median follow-up of 42 months (interquartile range 31-58), in the observation arm the median RFS was 35 months, RFS probability was 57% (95% CI 42-76%) at 24 and 44% (95% CI 30-65%) at 48 months. In the sorafenib arm, median RFS was 21 months, RFS probability was 50% (95% CI 34-71%) at 24 and 32% (95% CI 18-57%) at 48 months (p = 0.342;HR 1.35;95% CI 0.72-2.54). Forty-seven percent and 37.5% of the patients in the two arms, respectively, are disease free. The site of relapses was independent of the previous metastasectomy site.Expert commentary: Sorafenib after metastasectomy did not improve RFS, but surgery in selected patients should be considered in order to potentially improve survival.Clinical trial registration: www.clinicaltrials.gov identifier is NCT0144480.

Is there a role for targeted therapies in the collecting ducts of Bellini carcinoma?

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Background: Carcinoma of Bellini collecting ducts (CDC) is very uncommon but it is one of the most aggressive urological entities. For this tumor, originating from the epithelium of Bellini ducts in the distal tubule and preferentially occurring in young populations, no standard effective therapy has been so far established. Results of previous clinical experiences with chemo- or immunotherapy have been disappointing. We report our experience in 7 cases of CDC treated with targeted therapies.

Methods: From December 2004 to May 2010, 333 patients with advanced renal cell carcinoma have been treated with targeted therapies at Istituto Nazionale Tumori of Milan. From the global database analysis, seven cases with histological subtype of CDC have been identified. All patients had advanced disease and received a targeted therapy as first-line treatment. Six of them underwent previous nephrectomy, all had nodal involvement, and three had two or more sites of disease including lung, liver, and adrenal glands. Four patients received sorafenib as first-line treatment, two sunitinib, and one temsirolimus. After sorafenib failure, two patients received a second-line treatment consisting of both sunitinib and temsirolimus.

Results: Five patients developed early progression of disease with a very short 4-month survival. One patient had a long term partial response of 33 months with sorafenib, he underwent second-line sunitinib and had no progression for further 10 months. The last patient reached a progression-free survival of 6 months with temsirolimus; when progressed, he achieved a disease control for further 9 months during sunitinib therapy. Both patients are alive after 50 and 15 months of treatment, respectively. The most common adverse events, low or moderate in severity, consisted of fatigue, hand-foot skin reaction, diarrhea, hypertension, and anemia.

Conclusions: Prognosis of advanced CDC remains unfavorable. New target agents may be active in this disease and need further prospective phase II studies.

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