Trial reportJournal for immunotherapy of cancer2022
Efficacy of pembrolizumab in patients with advanced cancer of unknown primary (CUP): a phase 2 non-randomized clinical trial.
Trial report in Journal for immunotherapy of cancer, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02721732 (Phase II Study for the Evaluation of Efficacy of Pembrolizumab), which is not on this map. Cited by 36 papers, 2 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Phase II Study for the Evaluation of Efficacy of Pembrolizumab (MK-3475) in Patients With Rare Tumors
Who cites it
36 citing papers in PubMed, 2 syntheses or guidelines pooled it, 40 citations in OpenAlex.
- Occult squamous cell carcinoma presenting as oligometastatic lymphadenopathy. A systematic review with a case report.Oncology reviews · 2026Pooled it
- Comparison of different predictive biomarker testing assays for PD-1/PD-L1 checkpoint inhibitors response: a systematic review and network meta-analysis.Frontiers in immunology · 2023Pooled it
- Anti-PD-1 plus nab-paclitaxel and bevacizumab for second-line treatment of cancer of unknown primary (Fudan CUP-002): a phase II trial.Nature communications · 2026Trial
- Nivolumab and ipilimumab in recurrent or refractory cancer of unknown primary: a phase II trial.Nature communications · 2023Trial
- Cancer of unknown primary: the evolution of tissue of origin identification in the artificial intelligence era.Biomarker research · 2026Review
- Breaking New Ground in Cervical Metastatic Carcinoma of Unknown Primary: Neoadjuvant Immunochemotherapy's Pathologic Regression and Survival Advantage.Annals of surgical oncology · 2026Article
- Nutritional indices are potentially important prognostic biomarkers before chemotherapy for non-specific subsets of cancer of unknown primary origin.Molecular and clinical oncology · 2026Article
- Article
- Comparative predictive value of immunotherapy biomarkers: a systematic review and network meta-analysis.International journal of surgery (London, England) · 2026Article
- SMARCB1 (INI-1)-deficient carcinoma with eosinophilia and cervical lymph node metastasis of unknown primary: a case report and literature review.Frontiers in oncology · 2026Article
- Phase 2 Study of Monotherapy with Pembrolizumab for Advanced Adrenocortical Carcinoma.Journal of immunotherapy and precision oncology · 2025Article
- Shaping Precision Medicine: The Journey of Sequencing Technologies Across Human Solid Tumors.Biomedicines · 2025Review
- Rethinking cancer of unknown primary: from diagnostic challenge to targeted treatment.Nature reviews. Clinical oncology · 2025Review
- Successful Identification and Treatment of Cancer of Unknown Primary Originating From Gastric Cancer Using Comprehensive Genomic Profiling and Immune Checkpoint Inhibitor Therapy: A Case Report.Cancer reports (Hoboken, N.J.) · 2025Article
- Clinical efficacy of immune checkpoint inhibitors for cancer of unknown primary: a multi-center retrospective study.BMC cancer · 2025Article
- Outcomes and molecular profiles in sarcomatoid carcinoma of unknown primary: the Mayo Clinic experience.The oncologist · 2025Article
- Clinical outcome and genomic biomarkers of immune checkpoint inhibitor-based therapies for cancer of unknown primary: a multicenter, real-world study.Journal of cancer research and clinical oncology · 2025Article
- Evolution in the diagnosis and treatment of carcinoma of unknown primary: a multicenter Canadian analysis.The oncologist · 2025Article
- Article
- Advancements in Diagnostics and Therapeutics for Cancer of Unknown Primary in the Era of Precision Medicine.MedComm · 2025Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
15 authors at 1 institution in 1 country.
Funding
Abstract
backgroundCancer of unknown primary (CUP) is an aggressive rare malignancy with limited treatment options. Data regarding clinical activity of immune checkpoint inhibitors in CUP is lacking. Therefore, we evaluated the efficacy of pembrolizumab, a programmed cell death-1 inhibitor, in patients with CUP.
methodsThe study was designed as a phase 2 basket trial for independent rare tumor cohorts including CUP. Adult patients with CUP who had progressed on previous systemic therapy, performance status 0/1 and measurable disease per Response Evaluation Criteria in Solid Tumors (RECIST V.1.1) were eligible. Patients received pembrolizumab (200 mg) intravenously every 21 days. Twenty-nine patients were enrolled and treated between August 2016 and June 2020. The primary endpoint was non-progression rate (NPR) at 27 weeks (NPR-27) per immune-related RECIST. Key prespecified secondary endpoints were confirmed objective response rate (ORR), safety, duration of response (DoR), progression-free survival (PFS) and overall survival (OS). Pretreatment biopsies were examined for biomarkers of response (programmed cell death ligand-1 (PD-L1) expression and tumor infiltrating lymphocytes (TILs)).
resultsAmong 25 (of 29 enrolled) eligible and evaluable patients, 14 (56%) had poorly differentiated carcinoma. Patients received a median of two lines of therapy prior to enrollment. Median follow-up was 27.3 months. NPR-27 was observed in seven patients (28.0% (95% CI: 12.1 to 49.4)). ORR was 20.0% (95% CI: 6.8 to 40.7) with five patients achieving immune-related partial response with median DoR of 14.7 months (95% CI: 9.8 to 19.6). Median PFS and OS were 4.1 (95% CI: 3.1 to 5.1) and 11.3 (95% CI: 5.5 to 17.1) months, respectively. Treatment-related adverse events of any and grade ≥3 were seen in 19 (76%) and 4 (16%) patients, respectively. One (4%) patient had grade 3 immune-related acute kidney injury requiring treatment discontinuation. Neither PD-L1 nor TILs were associated with NPR-27. Both positive PD-L1 staining (44.4% vs 6.3%; p=0.040) and intense TIL infiltration (44.4% vs 6.3%; p=0.040) were associated with response.
conclusionPembrolizumab showed encouraging efficacy in patients with CUP with acceptable safety profile. TRIAL REGISTRATION NUMBER: NCT02721732.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.