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Tenosynovial Giant Cell Tumor Observational Platform Project (TOPP) Registry: A 2-Year Analysis of Patient-Reported Outcomes and Treatment Strategies

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ONCOLOGIST
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OXFORD UNIV PRESS
DOI: 10.1093/oncolo/oyad011

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diffuse-TGCT; pexidartinib; patient-reported outcome (PRO); prospective; quality of life (QoL); tenosynovial giant cell tumor observational platform project (TOPP)

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This article describes the impact of Tenosynovial giant cell tumor (D-TGCT) on patient-reported outcomes (PROs) based on the Tenosynovial giant cell tumor Observational Platform Project (TOPP) registry. The study found that patients without active treatment strategy had lower pain levels and better quality of life at 1-year and 2-year follow-ups. On the other hand, patients receiving systemic treatment had higher pain levels when they changed treatment strategies. These findings highlight the significant impact of treatment strategies on patient quality of life.
Background The Tenosynovial giant cell tumor Observational Platform Project (TOPP) registry is an international prospective study that -previously described the impact of diffuse-type tenosynovial giant cell tumour (D-TGCT) on patient-reported outcomes (PROs) from a baseline snapshot. This analysis describes the impact of D-TGCT at 2-year follow-up based on treatment strategies. Material and Methods TOPP was conducted at 12 sites (EU: 10; US: 2). Captured PRO measurements assessed at baseline, 1-year, and 2-year follow-ups were Brief Pain Inventory (BPI), Pain Interference, BPI Pain Severity, Worst Pain, EQ-5D-5L, Worst Stiffness, and -Patient-Reported Outcomes Measurement Information System. Treatment interventions were no current/planned treatment (Off-Treatment) and systemic treatment/surgery (On-Treatment). Results A total of 176 patients (mean age: 43.5 years) were included in the full analysis set. For patients without active treatment strategy -(Off-Treatment) at baseline (n = 79), BPI Pain Interference (1.00 vs. 2.86) and BPI Pain Severity scores (1.50 vs. 3.00) were numerically favorable in patients remaining Off-Treatment compared with those who switched to an active treatment strategy at year 1. From 1-year to 2-year -follow-ups, patients who remained Off-Treatment had better BPI Pain Interference (0.57 vs. 2.57) and Worst Pain (2.0 vs. 4.5) scores compared with patients who switched to an alternative treatment strategy. In addition, EQ-5D VAS scores (80.0 vs. 65.0) were higher in patients who remained -Off-Treatment between 1-year and 2-year follow-ups compared with patients who changed treatment strategy. For patients receiving systemic treatment at baseline, numerically favorable scores were seen in patients remaining on systemic therapy at 1-year follow-up: BPI Pain Interference (2.79 vs. 5.93), BPI Pain Severity (3.63 vs. 6.38), Worst Pain (4.5 vs. 7.5), and Worst Stiffness (4.0 vs. 7.5). From 1-year to 2-year follow-up, EQ-5D VAS scores (77.5 vs. 65.0) were higher in patients who changed from systemic treatment to a different treatment strategy. Conclusion These findings highlight the impact D-TGCT has on patient quality of life, and how treatment strategies may be influenced by these outcome measures. (ClinicalTrials.gov number: NCT02948088) The TOPP registry is an international prospective study that previously described the impact of diffuse-type tenosynovial giant cell tumor on patient-reported outcomes from a baseline snapshot. This article reports a 2-year follow-up based on treatment strategies and could represent a benchmark for future clinical trials.

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