{"ok":true,"data":{"subject":{"kind":"trial","nctId":"NCT04462406","title":"Using Biomarkers to Help Guide Safe Immunotherapy Discontinuation in Patients With Unresectable Stage IIIB-IV Melanoma, The PET-Stop Trial","sponsor":"ECOG-ACRIN Cancer Research Group","phases":["PHASE2"],"status":"ACTIVE_NOT_RECRUITING","indication":null,"disease":"melanoma"},"rows":[{"n":1,"question":"Is the biology right?","flags":[{"id":"somatic_driver","label":"Somatic driver evidence","value":"no","detail":"None of CTLA4, PDCD1 has somatic-mutation evidence in melanoma","rule":"Open Targets has somatic-mutation evidence for the target in this cancer","source":{"label":"Open Targets: CTLA4 in melanoma","url":"https://platform.opentargets.org/evidence/ENSG00000163599/MONDO_0005105","date":"2026-11-11T19:44:41.312Z"},"context":[]},{"id":"human_genetic","label":"Human genetic evidence","value":"no","detail":"No germline or somatic evidence for CTLA4, PDCD1 in melanoma","rule":"Any germline or somatic human genetic evidence for the target in this cancer, counted apart from animal-model and literature evidence","source":{"label":"Open Targets: CTLA4 in melanoma","url":"https://platform.opentargets.org/evidence/ENSG00000163599/MONDO_0005105","date":"2026-11-11T19:44:41.312Z"},"context":[]},{"id":"pediatric_target","label":"Pediatric target","value":"yes","detail":"CTLA4, PDCD1 on the FDA list","rule":"Target is on FDA's Pediatric Molecular Target List (relevant targets); membership alone neither requires nor waives a study","source":{"label":"FDA Pediatric Molecular Target List (Listed as February 2026 on the FDA Pediatric Oncology page; the file served is 9.7.22_the_relevant_molecular_target_list.xlsx, whose Summary of Changes sheet is headed 'SEPTEMBER 2022 UPDATE' (footnote date 2022-09-01))","url":"https://www.fda.gov/media/191157/download?attachment","date":"2026-11-11T07:05:03Z"},"context":[]},{"id":"haematologic","label":"Haematologic cancer","value":"no","detail":"Solid tumour","rule":"From the indication, or the registry conditions when no indication matches","source":{"label":"ClinicalTrials.gov NCT04462406","url":"https://clinicaltrials.gov/study/NCT04462406","date":"2026-11-11T19:44:41.312Z"},"context":[{"figure":"Likelihood of approval from phase 1: 7.5% haematologic vs 4.6% solid","dataset":"BIO / Informa / QLS 2021","years":"2011–2020","caveat":"Population-level, not a prediction."}]}],"facts":[{"label":"CTLA4 (via Ipilimumab)","text":"Evidence types in melanoma: literature, clinical; literature listed separately from human genetics. Datasources: clinical_precedence, europepmc.","source":{"label":"Open Targets: CTLA4 in melanoma","url":"https://platform.opentargets.org/evidence/ENSG00000163599/MONDO_0005105","date":"2026-11-11T19:44:41.312Z"}},{"label":"PDCD1 (via Nivolumab)","text":"Evidence types in melanoma: literature, clinical; literature listed separately from human genetics. Datasources: clinical_precedence, europepmc.","source":{"label":"Open Targets: PDCD1 in melanoma","url":"https://platform.opentargets.org/evidence/ENSG00000188389/MONDO_0005105","date":"2026-11-11T19:44:41.312Z"}}],"pending":[{"what":"Normal-tissue expression in vital organs","source":"Human Protein Atlas (ticket 36)"},{"what":"Pan-essential in cell lines","source":"DepMap (ticket 36)"},{"what":"Approved drug on this target","source":"Drugs@FDA (ticket 30)"}]},{"n":2,"question":"Can the result be trusted?","flags":[{"id":"randomised","label":"Randomised","value":"no","detail":"Non-randomised","rule":"Registry allocation field","source":{"label":"ClinicalTrials.gov NCT04462406","url":"https://clinicaltrials.gov/study/NCT04462406","date":"2026-11-11T19:44:41.312Z"},"context":[]},{"id":"small_denominator","label":"Small denominator","value":"no","detail":"150 planned; each patient moves a rate by 100 ÷ 150 = 0.7 points","rule":"Enrolment under 30; the arithmetic is shown, not a benchmark","source":{"label":"ClinicalTrials.gov NCT04462406","url":"https://clinicaltrials.gov/study/NCT04462406","date":"2026-11-11T19:44:41.312Z"},"context":[]},{"id":"primary_os","label":"Primary endpoint is overall survival","value":"no","detail":"Event free survival (EFS) rate (Arm A)","rule":"A registered primary outcome measure names overall survival","source":{"label":"ClinicalTrials.gov NCT04462406","url":"https://clinicaltrials.gov/study/NCT04462406","date":"2026-11-11T19:44:41.312Z"},"context":[{"figure":"Non-OS primary endpoint: odds ratio 2.79 for a positive phase 3","dataset":"Otsuka 2021, 400 phase 3 oncology trials","years":"to 2020","caveat":"Shown with the next figure: a surrogate is easier to hit, and often a weak guide to survival."},{"figure":"52% of surrogate-to-OS correlations are low","dataset":"Prasad 2015","years":"published to 2014","caveat":"Shown with the figure above."}]},{"id":"results_overdue","label":"Results overdue","value":"no","detail":"Primary completion expected 2027-01-31; not yet due","rule":"Primary completion (actual) more than 12 months ago and no results posted to the registry","source":{"label":"ClinicalTrials.gov NCT04462406","url":"https://clinicaltrials.gov/study/NCT04462406","date":"2026-11-11T19:44:41.312Z"},"context":[]}],"facts":[],"pending":[{"what":"Treated and evaluable counts, assessor, confirmed response, follow-up and data cutoff","source":"Readout extraction (ticket 32)"},{"what":"Primary endpoint changed between registry versions","source":"Registry versions in the store (ticket 32)"}]},{"n":3,"question":"What must it beat?","flags":[],"facts":[],"pending":[{"what":"Control-arm result and approved therapies for the same segment, with label links","source":"Drugs@FDA, FDA labels and readouts (tickets 30, 32)"}]},{"n":4,"question":"Too crowded, or too late?","flags":[],"facts":[{"label":"Stopped on this target","text":"179 terminated, withdrawn or suspended trials of drugs against CTLA4; 8 give no reason. Reasons are quoted as the registry gives them on the target page.","source":{"label":"CTLA4: what already stopped","url":"/target/ENSG00000163599#stopped","date":"2026-11-11T19:44:41.320Z"}}],"pending":[{"what":"Programs on the target by phase and months behind the leader","source":"Programs and Drugs@FDA (ticket 33)"}]},{"n":5,"question":"Can it be approved, and stay approved?","flags":[{"id":"single_country","label":"Single-country","value":"yes","detail":"All 482 sites in United States","rule":"All listed sites are in one country; the share of US sites is shown","source":{"label":"ClinicalTrials.gov NCT04462406","url":"https://clinicaltrials.gov/study/NCT04462406?tab=locations","date":"2026-11-11T19:44:41.312Z"},"context":[]},{"id":"eu_pip","label":"EU paediatric investigation plan","value":"yes","detail":"EMEA-002727-PIP03-23 (nivolumab;relatlimab, Treatment of melanoma): P: decision agreeing on a investigation plan, with or without partial waiver(s) and or deferral(s), 6 May 2024; EMA/PE/0000232936 (atigotatug;nivolumab, Treatment of small cell lung cancer): W: decision granting a waiver in all age groups for all conditions or indications, 21 Mar 2025; EMEA-003104-PIP02-22 (Favezelimab;pembrolizumab, Treatment of Hodgkin lymphoma): P: decision agreeing on a investigation plan, with or without partial waiver(s) and or deferral(s), date not given; EMEA-001407-PIP02-15-M07 (nivolumab, Treatment of malignant neoplasms of lymphoid tissue;Treatment of malignant neoplasms of the central nervous system): PM: decision on the application for modification of an agreed PIP, 6 May 2024; +14 more","rule":"An EMA PIP decision (agreement, modification or waiver) lists the drug as its active substance, exact name","source":{"label":"EMA data download (dated snapshot)","url":"https://www.ema.europa.eu/en/documents/report/medicines-output-paediatric_investigation_plans-output-json-report_en.json","date":"2026-11-11T09:12:26Z"},"context":[]},{"id":"eu_orphan","label":"EU orphan designation","value":"yes","detail":"EU/3/26/3215 positive 25 Mar 2026: Treatment of pulmonary neuroendocrine carcinoma","rule":"An EU orphan designation lists the drug as its active substance (exact name) or belongs to a medicine that does; withdrawn and expired designations are listed with their status","source":{"label":"EMA EU/3/26/3215","url":"https://www.ema.europa.eu/en/medicines/human/orphan-designations/eu-3-26-3215","date":"2026-11-11T09:12:26Z"},"context":[]},{"id":"eu_authorised","label":"Authorised in the EU","value":"yes","detail":"Keytruda: authorised since 17 Jul 2015; Opdivo: authorised since 19 Jun 2015; Opdualag: authorised since 15 Sept 2022; Yervoy: authorised since 13 Jul 2011; +1 more","rule":"An EMA medicine record lists the drug as its active substance or INN, exact name; national-only authorisations are not in this file","source":{"label":"EMA data download (dated snapshot)","url":"https://www.ema.europa.eu/en/documents/report/medicines-output-medicines_json-report_en.json","date":"2026-11-11T09:12:26Z"},"context":[]},{"id":"fda_orphan","label":"FDA orphan designation","value":"not published","detail":"FDA's orphan designation database turns away automated requests, so this app does not read it; search it by hand at the link","rule":"Would be: an FDA orphan designation names the drug","source":{"label":"FDA orphan designations search","url":"https://www.accessdata.fda.gov/scripts/opdlisting/oopd/","date":""},"context":[]},{"id":"fda_ped_approval","label":"FDA pediatric oncology approval","value":"yes","detail":"Ipilimumab [Yervoy], 8 Apr 2025: In combination with nivolumab, for the treatment of adult and pediatric patients 12 years and older with unresectable or metastatic microsatellite instability high (MSI-H) or mismatch repair deficient (dMMR) colorectal cancer (CRC); Ipilimumab [Yervoy], 15 Feb 2023: As a single agent or in combination with nivolumab, for the treatment of unresectable or metastatic melanoma in adult and pediatric patients 12 years and older; Nivolumab and hyaluronidase-nvhy [Opdivo Quantig], 24 Nov 2025: Treatment of adult and pediatric patients 12 years and older who weigh 30 kg or greater with unresectable or metastatic microsatellite instability-high (MSI-H) or mismatch repair deficient (dMMR) colorectal cancer (CRC) following treatment with intravenous nivolumab and ipilimumab combination therapy; +19 more","rule":"FDA's Pediatric Oncology Drug Approvals table names the drug","source":{"label":"FDA Pediatric Oncology Drug Approvals (content current as of 2026-03-03)","url":"https://www.fda.gov/about-fda/oncology-center-excellence/pediatric-oncology-drug-approvals","date":"2026-11-11T19:44:41.335Z"},"context":[]},{"id":"studies_under_18","label":"Registered studies open to children","value":"yes","detail":"209 interventional studies of Ipilimumab, Nivolumab, Pembrolizumab include patients under 18; 111 are recruiting, not yet recruiting or active","rule":"The registry's age group includes Child (birth to 17 years), which also counts studies that set no minimum age","source":{"label":"ClinicalTrials.gov search","url":"https://clinicaltrials.gov/search?intr=%22Ipilimumab%22+OR+%22Nivolumab%22+OR+%22Pembrolizumab%22&aggFilters=ages%3Achild%2CstudyType%3Aint","date":"2026-11-11T19:44:41.340Z"},"context":[]}],"facts":[{"label":"Caveat","text":"Site counts are not patients per country, and trials registered only outside ClinicalTrials.gov are not covered. Where the sites are is a fact about the record, not a judgement of its quality."},{"label":"Rare pediatric disease voucher","text":"FDA, content current as of 29 Apr 2026: “As of February 3, 2026, enactment of the Consolidated Appropriations Act, 2026, the rare pediatric disease PRV program will sunset after September 30, 2029. FDA may not award any PRVs under this program after September 30, 2029.” Voucher sale prices are not shown here; they appear only as company-reported news.","source":{"label":"FDA: Rare Pediatric Disease Designation and Priority Review Voucher Programs","url":"https://www.fda.gov/industry/medical-products-rare-diseases-and-conditions/rare-pediatric-disease-designation-and-priority-review-voucher-programs","date":"2026-11-11"}}],"pending":[{"what":"Precedent approvals for target, modality and endpoint; accelerated-approval status","source":"Drugs@FDA and FDA accelerated-approval tables (ticket 30)"}]},{"n":6,"question":"Can the sponsor finish?","flags":[],"facts":[{"label":"Sponsor","text":"ECOG-ACRIN Cancer Research Group (academic or other)","source":{"label":"ClinicalTrials.gov NCT04462406","url":"https://clinicaltrials.gov/study/NCT04462406","date":"2026-11-11T19:44:41.312Z"}},{"label":"principal investigator","text":"Geoffrey T Gibney, ECOG-ACRIN Cancer Research Group","source":{"label":"Person page","url":"/person/Geoffrey%20T%20Gibney","date":"2026-11-11T19:44:41.312Z"}}],"pending":[{"what":"Filed cash, quarterly spend and the runway arithmetic","source":"SEC XBRL company facts (ticket 37)"},{"what":"Sponsor's completed vs stopped oncology trials and results-reporting record","source":"Registry, by company (ticket 37)"}]}],"limits":"Public records cannot show: sales forecasts; a probability of success for this asset; full deal terms and net prices; FDA designations and action dates before approval (shown only as company-reported); clinical holds unless the company disclosed them; manufacturing; patents on unapproved drugs; whether preclinical findings have been replicated.","sources":[{"label":"ClinicalTrials.gov NCT04462406","url":"https://clinicaltrials.gov/study/NCT04462406","date":"2026-11-11T19:44:41.312Z"},{"label":"Open Targets Platform","url":"https://platform.opentargets.org","date":"2026-11-11T19:44:41.312Z"},{"label":"FDA Pediatric Molecular Target List (Listed as February 2026 on the FDA Pediatric Oncology page; the file served is 9.7.22_the_relevant_molecular_target_list.xlsx, whose Summary of Changes sheet is headed 'SEPTEMBER 2022 UPDATE' (footnote date 2022-09-01))","url":"https://www.fda.gov/media/191157/download?attachment","date":"2026-11-11T07:05:03Z"}]},"source":"ClinicalTrials.gov + Open Targets","fetchedAt":"2026-11-11T19:44:41.308Z"}