Real world outcomes of patients with non-clear cell renal cell carcinoma: A single Asian centre experience.

Authors

null

Johan W.K. Chan

National Cancer Centre of Singapore, Singapore, Singapore

Johan W.K. Chan , Daniel Peh , Wei Chong Tan , Hui Shan Tan , Quan Sing Ng , Tanujaa Rajasekaran , Yi Lin Teh , Stephanie Saw , Wan Ling Tan , Gillianne Lai , Amit Jain , Ravindran Kanesvaran

Organizations

National Cancer Centre of Singapore, Singapore, Singapore, Lee Kong Chian School of medicine, Singapore, Singapore, Nat'l Cancer Ctr, Singapore, Singapore, National Cancer Center of Singapore, Singapore, Singapore, nccs, Singapore, Singapore, Singapore General Hospital, National Cancer Centre Singapore, Singapore, Singapore

Research Funding

No funding received
None.

Background: Non-clear cell RCC (nccRCC) represents a heterogenous group of tumors which is less well studied than clear cell RCC. Clinical data supporting the treatment of nccRCC are still based on phase 2 studies and clinical trials conducted in ccRCC. Little is known about this group of patients in Asia. In this study, we aim to report the real world outcomes of nccRCC patients in a cancer centre in Singapore. Methods: We conducted a retrospective analysis on 81 non-clear cell RCC patients treated at the National Cancer Centre Singapore from 2007-2022. Data on patient demographics, disease characteristics, treatment outcomes and adverse events were collected retrospectively up till March 2022. Overall survival (OS) and progression free survival (PFS) were estimated using the Kaplan-Meier method. Responses to treatment were recorded based on RECIST v1.1 and analyzed using logistic regression. Results: 81 patients were included in this analysis, with a median age at diagnosis of 57 years old. Papillary RCC accounted for 32% (n=26) of the cases, chromophobe RCC was 2% (n=2), unclassified RCC was 28% (n=23), and other subtypes was 20% (n=24). Sarcomatoid features were present in 8% (n=10). Median follow-up time was 24 months. Among this cohort, 73 patients (90%) received tyrosine kinase inhibitors (TKI) alone, 8 patients (9%) had immunotherapy with VEGF TKI while 4 patients (4%) underwent dual checkpoint inhibitors. Median OS for the cohort was 19.4 months, while median PFS was 16 months. Overall disease control rate rate (CR/PR/SD) for first-line treatment was 60%. Comparison of outcomes shown below. Conclusions: This real-world Asian study provides important data regarding clinical outcomes in this rare and heterogeneous group of non-clear cell RCC patients. OS in nccRCC remains inferior to ccRCC and is comparable to data reported in Western populations

Overall CohortIO + TKIDual CPITKI
N 815373
Response Rate (%)2020020
DCR (%)6060052
1st Line Median PFS (mo)16162.527.3
Median OS (mo)19.418.2620

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Abstract Details

Meeting

2023 ASCO Genitourinary Cancers Symposium

Session Type

Poster Session

Session Title

Poster Session C: Renal Cell Cancer; Adrenal, Penile, Urethral and Testicular Cancers

Track

Renal Cell Cancer,Adrenal Cancer,Penile Cancer,Testicular Cancer,Urethral Cancer

Sub Track

Quality of Care/Quality Improvement and Real-World Evidence

Citation

J Clin Oncol 41, 2023 (suppl 6; abstr 632)

DOI

10.1200/JCO.2023.41.6_suppl.632

Abstract #

632

Poster Bd #

F2

Abstract Disclosures