Clinical Trials

GastrointestinalGenitourinaryGynecologicThoracic

214 enrolled

Carcinoma, Non-Small-Cell Lung, Ovarian Neoplasms, Stomach Neoplasms, Testicular Neoplasms, Endometrial Neoplasms

NCT07046923 2026-04-17

A Study of LY4175408 in Participants With Advanced Cancer

BreastGynecologicThoracic

240 enrolled

Carcinoma, Non-Small-Cell Lung, Neoplasm Metastasis, Endometrial Neoplasms, Small Cell Lung Carcinoma, Triple Negative Breast Neoplasms

NCT07229313 2026-04-16

A Study of KIVU-107 in Participants With Locally Advanced or Metastatic Solid Tumors

BreastGastrointestinalGynecologicHead & NeckSarcomaThoracic

76 enrolled

Squamous Cell Carcinoma of Head and Neck, Esophageal Squamous Cell Carcinoma, Breast Neoplasms, Carcinoma, Non-Small-Cell Lung, Uterine Cervical Neoplasms, Neoplasm Metastasis, Ovarian Neoplasms, Pancreatic Neoplasms, Sarcoma, Colorectal Neoplasms, Endometrial Neoplasms, Small Cell Lung Carcinoma, Triple Negative Breast Neoplasms

NCT07458347 2026-04-15

A Phase 1 Dose-escalation Trial of KST-6051 in Participants With Advanced Solid Tumors With Kirsten Rat Sarcoma Viral Oncogene Homolog (KRAS) Mutation

145 enrolled

Biliary Tract Neoplasms, Colonic Neoplasms, Lung Neoplasms, Neoplasm Metastasis, Pancreatic Neoplasms, Rectal Neoplasms, Colorectal Neoplasms, Endometrial Neoplasms, Cholangiocarcinoma

NCT01366144 2026-04-13

Veliparib, Paclitaxel, and Carboplatin in Treating Patients With Solid Tumors That Are Metastatic or Cannot Be Removed by Surgery and Liver or Kidney Dysfunction

BreastDermatologicGastrointestinalGenitourinaryGynecologicHead & NeckThoracic

94 enrolled

Breast Neoplasms, Carcinoma, Transitional Cell, Esophageal Neoplasms, Head and Neck Neoplasms, Lung Neoplasms, Melanoma, Neoplasm Metastasis, Neoplasms, Unknown Primary, Ovarian Neoplasms, Testicular Neoplasms, Endometrial Neoplasms, Liver Failure, Renal Insufficiency

NCT02465060 2026-04-13

Targeted Therapy Directed by Genetic Testing in Treating Patients With Advanced Refractory Solid Tumors, Lymphomas, or Multiple Myeloma (The MATCH Screening Trial)

Phase 2 Active not recruiting

6,452 enrolled 2 FDA

BreastCNSDermatologicGastrointestinalGenitourinaryGynecologicHead & NeckLymphoidOther hematologic neoplasmPlasma cellThoracic

Urinary Bladder Neoplasms, Breast Neoplasms, Carcinoma, Renal Cell, Uterine Cervical Neoplasms, Colonic Neoplasms, Esophageal Neoplasms, Glioma, Carcinoma, Hepatocellular, Lung Neoplasms, Lymphoma, Melanoma, Multiple Myeloma, Ovarian Neoplasms, Pancreatic Neoplasms, Prostatic Neoplasms, Rectal Neoplasms, Stomach Neoplasms, Thyroid Neoplasms, Uterine Neoplasms, Colorectal Neoplasms, Endometrial Neoplasms, Hematologic Neoplasms

NCT05858736 2026-04-09

PRESERVE-009

DermatologicGastrointestinalGenitourinaryGynecologicHead & NeckThoracic

18 enrolled

Squamous Cell Carcinoma of Head and Neck, Anus Neoplasms, Bile Duct Neoplasms, Urinary Bladder Neoplasms, Carcinoma, Non-Small-Cell Lung, Carcinoma, Renal Cell, Uterine Cervical Neoplasms, Esophageal Neoplasms, Fallopian Tube Neoplasms, Carcinoma, Hepatocellular, Melanoma, Stomach Neoplasms, Colorectal Neoplasms, Endometrial Neoplasms

NCT06695845 2026-04-09

A Phase 2 Study of Zanidatamab in Patients With HER2-expressing Tumors

Phase 2 Recruiting

200 enrolled

BreastGastrointestinalGenitourinaryGynecologicHead & NeckThoracic

Breast Neoplasms, Carcinoma, Non-Small-Cell Lung, Carcinoma, Transitional Cell, Esophageal Neoplasms, Ovarian Neoplasms, Pancreatic Neoplasms, Salivary Gland Neoplasms, Stomach Neoplasms, Colorectal Neoplasms, Endometrial Neoplasms

NCT05462717 2026-04-08

Dose Escalation and Dose Expansion Study of RMC-6291 Monotherapy in Subjects With Advanced KRASG12C Mutant Solid Tumors

222 enrolled

GastrointestinalGenitourinaryGynecologicThoracic

Appendiceal Neoplasms, Bronchial Neoplasms, Carcinoma, Non-Small-Cell Lung, Colonic Neoplasms, Esophageal Neoplasms, Gastrointestinal Neoplasms, Intestinal Neoplasms, Lung Diseases, Lung Neoplasms, Neoplasm Metastasis, Neoplasms, Neoplasms by Site, Ovarian Neoplasms, Pancreatic Neoplasms, Rectal Neoplasms, Respiratory Tract Diseases, Respiratory Tract Neoplasms, Stomach Neoplasms, Thoracic Neoplasms, Colorectal Neoplasms, Endometrial Neoplasms, Carcinoma, Pancreatic Ductal

NCT06973161 2026-04-08

ESPERANZA: External Control Arm Study for T-DXd for Patients With HER2 IHC3+ Solid Tumors

Completed

140 enrolled

Biliary Tract Neoplasms, Urinary Bladder Neoplasms, Uterine Cervical Neoplasms, Lung Neoplasms, Ovarian Neoplasms, Pancreatic Neoplasms, Colorectal Neoplasms, Endometrial Neoplasms

NCT04044859 2026-04-07

ADP-A2M4CD8 as Monotherapy or in Combination With Either Nivolumab or Pembrolizumab in HLA-A2+ Subjects With MAGE-A4 Positive Tumors (SURPASS)

DermatologicGastrointestinalGynecologicHead & NeckThoracic

120 enrolled

Carcinoma, Non-Small-Cell Lung, Esophageal Neoplasms, Head and Neck Neoplasms, Melanoma, Neoplasm Metastasis, Ovarian Neoplasms, Stomach Neoplasms, Endometrial Neoplasms

NCT05579366 2026-04-07

RAINFOL-01

BreastGynecologicOther solid neoplasmThoracic

764 enrolled

Breast Neoplasms, Carcinoma, Non-Small-Cell Lung, Fallopian Tube Neoplasms, Mesothelioma, Ovarian Neoplasms, Uterine Neoplasms, Endometrial Neoplasms, Triple Negative Breast Neoplasms

NCT06003231 2026-04-07

A Study of Disitamab Vedotin in Previously Treated Solid Tumors That Express HER2

Phase 2 Active not recruiting

120 enrolled

GynecologicHead & NeckThoracic

Carcinoma, Non-Small-Cell Lung, Head and Neck Neoplasms, Ovarian Neoplasms, Endometrial Neoplasms

NCT07216105 2026-04-07

FT836 With or Without Chemotherapy and/or Monoclonal Antibodies, in Participants With Advanced Solid Tumors

BreastGastrointestinalGynecologicHead & NeckThoracic

113 enrolled

Squamous Cell Carcinoma of Head and Neck, Breast Neoplasms, Carcinoma, Non-Small-Cell Lung, Ovarian Neoplasms, Colorectal Neoplasms, Endometrial Neoplasms

NCT07124000 2026-03-31

DP-04

Recruiting

100 enrolled

DermatologicGastrointestinalGenitourinaryGynecologicHead & NeckSarcomaThoracic

Adenocarcinoma, Anus Neoplasms, Urinary Bladder Neoplasms, Carcinoma, Renal Cell, Uterine Cervical Neoplasms, Esophageal Neoplasms, Gallbladder Neoplasms, Gastrointestinal Neoplasms, Head and Neck Neoplasms, Liver Neoplasms, Melanoma, Mouth Neoplasms, Ovarian Neoplasms, Pancreatic Neoplasms, Prostatic Neoplasms, Salivary Gland Neoplasms, Sarcoma, Testicular Neoplasms, Thyroid Neoplasms, Urethral Neoplasms, Vaginal Neoplasms, Vulvar Neoplasms, Endometrial Neoplasms, Gastrointestinal Stromal Tumors, Small Cell Lung Carcinoma

NCT07503808 2026-03-31

A Study of IDE034 in Adult Participants With Locally Advanced/Metastatic Solid Tumors Types

BreastGastrointestinalGynecologicHead & NeckThoracic

150 enrolled

Squamous Cell Carcinoma of Head and Neck, Esophageal Squamous Cell Carcinoma, Carcinoma, Non-Small-Cell Lung, Colorectal Neoplasms, Endometrial Neoplasms, Triple Negative Breast Neoplasms

NCT03860272 2026-03-30

Fc-Engineered Anti-CTLA-4 Monoclonal Antibody in Advanced Cancer

GastrointestinalGenitourinaryGynecologicSarcomaThoracic

499 enrolled

Fibrolamellar hepatocellular carcinoma, Carcinoma, Non-Small-Cell Lung, Hemangiosarcoma, Ovarian Neoplasms, Prostatic Neoplasms, Endometrial Neoplasms

NCT05799274 2026-03-30

RAD301

9 enrolled

BreastCNSGastrointestinalGynecologicOther hematologic neoplasmThoracic

Esophageal Squamous Cell Carcinoma, Carcinoma, Non-Small-Cell Lung, Uterine Cervical Neoplasms, Ovarian Neoplasms, Endometrial Neoplasms

NCT05142033 2026-03-27

ASAP

Recruiting

25,000 enrolled

Breast Neoplasms, Colonic Neoplasms, Gastrointestinal Neoplasms, Lung Neoplasms, Neoplasms, Ovarian Neoplasms, Central Nervous System Neoplasms, Endometrial Neoplasms, Hematologic Neoplasms

NCT07189871 2026-03-27

BetaBart

BreastGastrointestinalGynecologicHead & NeckThoracic

61 enrolled

Squamous Cell Carcinoma of Head and Neck, Esophageal Squamous Cell Carcinoma, Carcinoma, Non-Small-Cell Lung, Uterine Cervical Neoplasms, Ovarian Neoplasms, Colorectal Neoplasms, Endometrial Neoplasms, Small Cell Lung Carcinoma, Triple Negative Breast Neoplasms

NCT07444814 2026-03-27

Study Evaluating the Safety and Efficacy of HWK-007, a PTK7-directed Antibody Drug Conjugate in Participants With Advanced Solid Tumors

226 enrolled

GynecologicThoracic

Carcinoma, Non-Small-Cell Lung, Lung Neoplasms, Ovarian Neoplasms, Endometrial Neoplasms

NCT05277051 2026-03-23

First-Time-in-Human Study of GSK4381562 in Participants With Advanced Solid Tumors

BreastGastrointestinalGenitourinaryGynecologicHead & NeckThoracic

152 enrolled

Squamous Cell Carcinoma of Head and Neck, Breast Neoplasms, Carcinoma, Non-Small-Cell Lung, Carcinoma, Renal Cell, Neoplasm Metastasis, Neoplasms, Stomach Neoplasms, Colorectal Neoplasms, Endometrial Neoplasms

NCT06293898 2026-03-23

Open Label Study to Evaluate BL-M07D1 in HER2 Expressing Malignant Solid Tumors

BreastGastrointestinalGenitourinaryGynecologicThoracic

280 enrolled

Biliary Tract Neoplasms, Breast Neoplasms, Carcinoma, Transitional Cell, Uterine Cervical Neoplasms, Esophageal Neoplasms, Lung Neoplasms, Ovarian Neoplasms, Stomach Neoplasms, Endometrial Neoplasms

NCT05143970 2026-03-20

CHANCES

27 enrolled

Breast Neoplasms, Esophageal Neoplasms, Lung Neoplasms, Neoplasm Metastasis, Ovarian Neoplasms, Pancreatic Neoplasms, Stomach Neoplasms, Endometrial Neoplasms

NCT04300556 2026-03-13

A Study to Evaluate the Safety, Tolerability, and Efficacy of MORAb-202 (Herein Referred to as Farletuzumab Ecteribulin), a Folate Receptor Alpha (FRα)-Targeting Antibody-drug Conjugate (ADC) in Participants With Selected Tumor Types

BreastGynecologicThoracic

182 enrolled

Adenocarcinoma, Carcinoma, Non-Small-Cell Lung, Neoplasms, Ovarian Neoplasms, Endometrial Neoplasms, Triple Negative Breast Neoplasms

NCT06607185 2026-03-13

A Study of the Pan-KRAS Inhibitor LY4066434 in Participants With KRAS Mutant Solid Tumors

750 enrolled

Carcinoma, Non-Small-Cell Lung, Colonic Neoplasms, Esophageal Neoplasms, Lung Neoplasms, Neoplasm Metastasis, Ovarian Neoplasms, Pancreatic Neoplasms, Rectal Neoplasms, Colorectal Neoplasms, Endometrial Neoplasms, Cholangiocarcinoma

NCT04585750 2026-03-12

The Evaluation of PC14586 in Patients With Advanced Solid Tumors Harboring a TP53 Y220C Mutation (PYNNACLE)

BreastGastrointestinalGenitourinaryGynecologicHead & NeckThoracic

300 enrolled

Breast Neoplasms, Carcinoma, Non-Small-Cell Lung, Gallbladder Neoplasms, Head and Neck Neoplasms, Lung Neoplasms, Neoplasm Metastasis, Ovarian Neoplasms, Prostatic Neoplasms, Colorectal Neoplasms, Endometrial Neoplasms, Small Cell Lung Carcinoma, Triple Negative Breast Neoplasms

NCT05269381 2026-03-12

PNeoVCA

BreastDermatologicGastrointestinalGenitourinaryGynecologicHead & NeckSarcomaThoracic

132 enrolled

Squamous Cell Carcinoma of Head and Neck, Carcinoma, Non-Small-Cell Lung, Carcinoma, Renal Cell, Carcinoma, Transitional Cell, Carcinosarcoma, Uterine Cervical Neoplasms, Carcinoma, Hepatocellular, Lung Neoplasms, Melanoma, Neoplasm Metastasis, Carcinoma, Merkel Cell, Endometrial Neoplasms, Triple Negative Breast Neoplasms

NCT06349642 2026-03-12

ELEPHAS-04

Recruiting

324 enrolled

DermatologicGastrointestinalGenitourinaryGynecologicSarcomaThoracic

Clear-cell metastatic renal cell carcinoma, Carcinoma, Non-Small-Cell Lung, Carcinoma, Renal Cell, Carcinosarcoma, Uterine Cervical Neoplasms, Esophageal Neoplasms, Carcinoma, Hepatocellular, Neoplasm Metastasis, Skin Neoplasms, Colorectal Neoplasms, Endometrial Neoplasms

NCT06218914 2026-03-09

Phase 1 Study to Investigate TCRTs KRAS Mutation in Unresectable, Advanced, and/or Metastatic Solid Tumors

108 enrolled

Phase 1/2 Not yet recruiting

Carcinoma, Non-Small-Cell Lung, Colorectal Neoplasms, Endometrial Neoplasms

NCT07453394 2026-03-06

QLS5132 Combination Therapy in Advanced Solid Tumors

626 enrolled

Carcinoma, Non-Small-Cell Lung, Ovarian Neoplasms, Stomach Neoplasms, Endometrial Neoplasms

NCT06257264 2026-03-05

A Study to Examine the Safety of Different Doses of BG-68501 Given to Participants With Advanced-Stage Tumors

BreastGastrointestinalGenitourinaryGynecologicThoracic

258 enrolled

Urinary Bladder Neoplasms, Breast Neoplasms, Ovarian Neoplasms, Prostatic Neoplasms, Stomach Neoplasms, Endometrial Neoplasms, Small Cell Lung Carcinoma, Triple Negative Breast Neoplasms

NCT07446049 2026-03-03

A Single-arm, Open-label, Multicenter, Phase Ib/II Clinical Trial of CVL237 Tablets in Combination With Serplulimab Injection for the Treatment of Advanced Solid Tumors With PTEN Loss or Low Expression

Phase 2 Not yet recruiting

180 enrolled

Breast Neoplasms, Uterine Cervical Neoplasms, Lung Neoplasms, Ovarian Neoplasms, Stomach Neoplasms, Endometrial Neoplasms

NCT05797168 2026-03-02

FONTANA

BreastGenitourinaryGynecologicThoracic

506 enrolled

GynecologicThoracic

Adenocarcinoma of Lung, Ovarian Neoplasms, Endometrial Neoplasms

NCT06171789 2026-02-25

PRO1107 in Patients With Advanced Solid Tumors

Phase 1/2 Terminated

33 enrolled

Carcinoma, Non-Small-Cell Lung, Carcinoma, Transitional Cell, Ovarian Neoplasms, Endometrial Neoplasms, Triple Negative Breast Neoplasms

NCT05208762 2026-02-23

A Study of PF-08046054/SGN-PDL1V in Advanced Solid Tumors

BreastGastrointestinalGynecologicHead & NeckThoracic

714 enrolled

Squamous Cell Carcinoma of Head and Neck, Esophageal Squamous Cell Carcinoma, Carcinoma, Non-Small-Cell Lung, Carcinoma, Hepatocellular, Stomach Neoplasms, Endometrial Neoplasms, Triple Negative Breast Neoplasms

NCT04258813 2026-02-20

ONE TEAM

Phase NA Active not recruiting

313 enrolled

BreastGastrointestinalGenitourinaryGynecologicHead & NeckThoracic

Breast Neoplasms, Carcinoma, Non-Small-Cell Lung, Carcinoma, Renal Cell, Cardiovascular Diseases, Colonic Neoplasms, Diabetes Mellitus, Esophageal Neoplasms, Head and Neck Neoplasms, Hypercholesterolemia, Hypertension, Liver Neoplasms, Neoplasms, Ovarian Neoplasms, Pancreatic Neoplasms, Prostatic Neoplasms, Endometrial Neoplasms

NCT04644068 2026-02-19

PETRA

Phase 1/2 Active not recruiting

702 enrolled

BreastGastrointestinalGenitourinaryGynecologicThoracic

Biliary Tract Neoplasms, Urinary Bladder Neoplasms, Breast Neoplasms, Carcinoma, Non-Small-Cell Lung, Uterine Cervical Neoplasms, Ovarian Neoplasms, Pancreatic Neoplasms, Prostatic Neoplasms, Stomach Neoplasms, Colorectal Neoplasms, Endometrial Neoplasms

NCT06305962 2026-02-19

177Lu-anti-PD-L1 sdAb in Metastatic Solid Tumors

Phase EARLY_PHASE1 Recruiting

30 enrolled

BreastDermatologicGynecologicHead & NeckThoracic

Turcot syndrome, Squamous Cell Carcinoma of Head and Neck, Carcinoma, Non-Small-Cell Lung, Melanoma, Endometrial Neoplasms, Small Cell Lung Carcinoma, Triple Negative Breast Neoplasms

NCT07023731 2026-02-19

A Study to Evaluate ARV-806 in Adults With Advanced Cancer That Has the KRAS G12D Mutation

DermatologicGastrointestinalGynecologicHead & NeckThoracic

159 enrolled

Adenocarcinoma Of Esophagus, Carcinoma, Non-Small-Cell Lung, Colonic Neoplasms, Gallbladder Neoplasms, Melanoma, Ovarian Neoplasms, Pancreatic Neoplasms, Stomach Neoplasms, Thyroid Neoplasms, Colorectal Neoplasms, Endometrial Neoplasms, Cholangiocarcinoma

NCT07334119 2026-02-19

Safety, Pharmacokinetics, Pharmacodynamics and Preliminary Efficacy of MT-304 in Adults With Advanced HER2-Expressing Solid Tumors

BreastGastrointestinalGenitourinaryGynecologicThoracic

60 enrolled

Adenocarcinoma Of Esophagus, Carcinoma, Ovarian Epithelial, Biliary Tract Neoplasms, Breast Neoplasms, Carcinoma, Non-Small-Cell Lung, Carcinoma, Transitional Cell, Colorectal Neoplasms, Endometrial Neoplasms, Cholangiocarcinoma

NCT04485013 2026-02-18

TTX-080 HLA-G Antagonist in Subjects With Advanced Cancers

BreastDermatologicGastrointestinalGenitourinaryGynecologicHead & NeckThoracic

240 enrolled

Adenocarcinoma of Lung, Squamous Cell Carcinoma of Head and Neck, Urinary Bladder Neoplasms, Breast Neoplasms, Carcinoma, Renal Cell, Uterine Cervical Neoplasms, Head and Neck Neoplasms, Kidney Neoplasms, Lung Neoplasms, Melanoma, Neoplasm Metastasis, Neoplasms, Ovarian Neoplasms, Prostatic Neoplasms, Stomach Neoplasms, Colorectal Neoplasms, Endometrial Neoplasms, Triple Negative Breast Neoplasms

NCT06586957 2026-02-11

A Study With NKT3964 for Adults With Advanced/Metastatic Solid Tumors

150 enrolled

Neoplasm Metastasis, Ovarian Neoplasms, Stomach Neoplasms, Uterine Diseases, Endometrial Neoplasms, Small Cell Lung Carcinoma, Triple Negative Breast Neoplasms

NCT06128551 2026-02-10

Study of Elironrasib and Daraxonrasib as Monotherapies and Combination Therapy in Participants With Advanced KRAS G12C Mutant Solid Tumors

534 enrolled

NCT06242470 2026-02-05

A Study of MGC026 in Participants With Advanced Solid Tumors

BreastDermatologicGastrointestinalGenitourinaryGynecologicHead & NeckSarcomaThoracic

250 enrolled

Squamous Cell Carcinoma of Head and Neck, Esophageal Squamous Cell Carcinoma, Urinary Bladder Neoplasms, Breast Neoplasms, Carcinoma, Non-Small-Cell Lung, Carcinoma, Renal Cell, Uterine Cervical Neoplasms, Carcinoma, Hepatocellular, Melanoma, Neoplasm Metastasis, Ovarian Neoplasms, Pancreatic Neoplasms, Sarcoma, Stomach Neoplasms, Colorectal Neoplasms, Endometrial Neoplasms, Small Cell Lung Carcinoma, Prostatic Neoplasms, Castration-Resistant

NCT05983432 2026-01-29

Evaluate BL-B01D1 in Patients With Metastatic or Unresectable Non-Small Cell Lung Cancer (NSCLC) and Other Solid Tumors

BreastGastrointestinalGynecologicHead & NeckThoracic

470 enrolled

Squamous Cell Carcinoma of Head and Neck, Breast Neoplasms, Carcinoma, Non-Small-Cell Lung, Uterine Cervical Neoplasms, Esophageal Neoplasms, Lung Neoplasms, Nasopharyngeal Neoplasms, Ovarian Neoplasms, Endometrial Neoplasms, Small Cell Lung Carcinoma, Triple Negative Breast Neoplasms

NCT06457997 2026-01-29

A Study of PHN-010 in Patients With Advanced Solid Tumors

Phase 1 Terminated

26 enrolled

Carcinoma, Uterine Cervical Neoplasms, Colonic Neoplasms, Lung Neoplasms, Neoplasms, Ovarian Neoplasms, Endometrial Neoplasms

NCT05150691 2026-01-28

A Phase 1/2a Study of DB-1303/BNT323 in Advanced/Metastatic Solid Tumors

796 enrolled

BreastDermatologicGastrointestinalGenitourinaryGynecologicHead & NeckThoracic

Bile Duct Neoplasms, Biliary Tract Neoplasms, Breast Neoplasms, Carcinoma, Carcinoma, Non-Small-Cell Lung, Gastrointestinal Neoplasms, Liver Neoplasms, Neoplasm Metastasis, Neoplasms, Recurrence, Stomach Neoplasms, Endometrial Neoplasms, Cholangiocarcinoma

NCT06172478 2026-01-28

A Study of HER3-DXd in Subjects With Locally Advanced or Metastatic Solid Tumors

Phase 2 Recruiting

740 enrolled

Urinary Bladder Neoplasms, Breast Neoplasms, Carcinoma, Non-Small-Cell Lung, Uterine Cervical Neoplasms, Esophageal Neoplasms, Head and Neck Neoplasms, Lung Neoplasms, Melanoma, Ovarian Neoplasms, Pancreatic Neoplasms, Prostatic Neoplasms, Stomach Neoplasms, Endometrial Neoplasms

NCT07371663 2026-01-28

An Phase Ib/II Clinical Trial of TCC1727 Combination Therapy in Advanced Solid Tumors