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Browse the failure-mode index

12,250 real negative results, null findings, and replication failures in Medicine. Search the index →

WASTE indexes published research — it does not host or republish full papers. Each entry is a metadata record compiled from open scholarly databases; the abstract is shown in full only where the paper is openly licensed, otherwise a short excerpt under fair use. Classifications are automated and approximate.

Abandoned HypothesisOpen accessMedicine

Spontaneous rupture and hemorrhage of a large simple hepatic cyst following external electrical muscle stimulation: a case managed by emergency laparoscopy.

Feng W, Ye Q, Wang Q et al. · 2026 · Journal of surgical case reports

Hemorrhagic rupture of a simple liver cyst is a rare clinical occurrence. Whether external physical forces can trigger such rupture remains unclear. A 47-year-old woman presented with acute abdominal pain 72 h following an electrical…

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Methods Dead-EndMedicine

Nomograms for predicting sentinel lymph node metastasis in melanoma in a Southern Brazilian population: an accuracy study.

Candiago Júnior AF, Traebert J, Cordeiro EZ · 2025 · Revista do Colegio Brasileiro de Cirurgioes

Introduction Sentinel lymph node biopsy is fundamental for staging and prognostication of cutaneous melanoma when indicated. However, it still yields a high rate of negative results. To reduce the rate of true negatives, oncology centers…

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Methods Dead-EndOpen accessMedicine

Improving the field accuracy of a malaria diagnostic algorithm combining sequential interpretation of rapid diagnostic test detecting PfHRP2 and pLDH in febrile children in a seasonal hyperendemic malaria transmission area in Burkina Faso.

Some DY, Kiemde F, Kabore B et al. · 2026 · PloS one

Objective To evaluate the field accuracy of a malaria diagnostic algorithm combining sequential interpretation of two-step malaria RDT detecting PfHRP2 and pLDH with information on previous antimalarial treatments within the past four…

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Replication FailureOpen accessMedicine

Cost-effectiveness analysis of point-of-care tests for causes of non-malarial febrile illnesses in low-resource settings: a case study from Lao PDR.

Painter C, Phommasone K, Mayxay M et al. · 2026 · BMJ public health

Introduction In many low- and middle-income countries, there is widespread use of point-of-care tests (POCTs) to diagnose a variety of infectious diseases, even in hospitals due to weak laboratory capacity. Often, POCT use is unregulated…

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Failed Experiment ReportOpen accessMedicine

Recent population history in Swedish cattle breeds.

Adepoju D, Ohlsson JI, Klingström T et al. · 2026 · Genetics, selection, evolution : GSE

Background In genetic terms, the history of a population can be described by its effective population size over time. We know that domestic cattle have gone through dramatic changes in recent history, including intensifying selection in…

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Methods Dead-EndMedicine

Minimum effective volume of the pericapsular nerve group (PENG) block in association with a standardized obturator nerve block for analgesia in hip osteoarthritis: An up-and-down study.

de Andrade Filho PH, da Silva Souza Barbosa R, Tafner GP et al. · 2026 · Journal of clinical anesthesia

Background The pericapsular nerve group (PENG) block has emerged as an effective regional anesthesia technique for managing hip pain, offering substantial analgesia while preserving motor function. However, the minimum effective volume…

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Methods Dead-EndMedicine

Cost-effectiveness of Commercial or Traditional Fecal Microbiota Transplantation for Recurrent Clostridioides difficile Infection.

Hirsch W, Enns EA, Khoruts A et al. · 2026 · Clinical infectious diseases : an official publication of the Infectious Diseases Society of America

Background Fecal microbiota transplantation (FMT) is the cost-effective strategy for managing recurrent Clostridioides difficile infection (rCDI). Prior costing models assumed FMT administration via colonoscopy. With the commercialization…

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Negative / Null Result ReportMedicine

Radiation dosimetry of <sup>15</sup>O-water based on dynamic large axial field of view PET.

Lubberink M, Åhlström A, Tolvanen T et al. · 2026 · Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology

Purpose Previously published effective dose coefficient estimates for 15 O-water are around 1 μSv/MBq, resulting in an effective dose of around 0.4 mSv for a typically injected activity of 400 MBq in clinical cardiac scans. These estimates…

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Negative / Null Result ReportMedicine

Application and Evaluation of a Formative Feedback Rubric on Nontechnical Skills Using Retrospective SIMPL App Data in General Surgery Residents.

Cloonan MR, Maginot ER, Tieken KR et al. · 2026 · Journal of surgical education

To determine the frequency of nontechnical skills (NTS) feedback provided by attending surgeons through narrative comments and assess its effectiveness using a validated formative feedback rubric. This retrospective cross-sectional study…

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Negative / Null Result ReportOpen accessMedicine

Economic evaluation of the second-line regimen of liposome irinotecan (II) combined with 5-FU/LV versus placebo combined with 5-FU/LV for locally advanced or metastatic pancreatic ductal adenocarcinoma in China.

Huang J, Ye H, Lin J et al. · 2026 · PloS one

Background The cost-effectiveness of liposome irinotecan (II) (HR070803) in combination with 5-fluorouracil and leucovorin as a treatment for patients with locally advanced or metastatic pancreatic ductal adenocarcinoma offering a…

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Negative / Null Result ReportMedicine

Clinical efficacy of portable, cost-effective manual thermal pulsation for obstructive meibomian gland dysfunction and factors associated with therapeutic efficacy.

Cheng X, Huang H, Fan Z et al. · 2026 · BMJ open ophthalmology

Objective To evaluate the efficacy and safety of portable, cost-effective manual thermal pulsation as a single therapy for meibomian gland dysfunction (MGD) and to compare the microbiota and lipid composition in subjects with different…

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Negative / Null Result ReportMedicine

Chronic toxicity and uptake of 10 Per- and Polyfluoroalkyl Acids to marine species Americamysis bahia and Atherinops affinis.

Hayman NT, Pandelides Z, Colvin MA et al. · 2026 · Environmental toxicology and chemistry

A lack of marine specific data results in challenges to assessing site-specific ecological risks and developing marine water quality criteria for per- and polyfluoroalkyl substances (PFAS). Here, the toxicity and bioaccumulation of…

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Negative / Null Result ReportMedicine

Effective Coverage of Rehabilitation for Adults with Chronic Primary Low Back Pain in Uganda.

De Groote W, Taremwa Y, Duttine A et al. · 2026 · International journal of environmental research and public health

In Uganda, in 2019, 6.8 million people experienced health conditions that are amenable to rehabilitation. This is largely due to musculoskeletal disorders such as low back pain (LBP). Measuring effective coverage of rehabilitation means…

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Negative / Null Result ReportOpen accessMedicine

Awareness of Effective Communication Skills Among Paediatric Dentists in Turkey.

Büyüksefil M, Çimen Ü, Şimşek Derelioğlu S et al. · 2026 · Oral health & preventive dentistry

Purpose Effective communication with paediatric patients is one of the cornerstones of paediatric dentistry. Strong communication skills play a critical role in reducing dental anxiety, enhancing patient satisfaction, and facilitating the…

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Negative / Null Result ReportMedicine

Comparison of effective phacoemulsification times used in cataract surgery between the Veritas Vision System and the Centurion Vision System.

Choi JY, Song WS, Won YK et al. · 2026 · Korean journal of ophthalmology : KJO

Purpose To compare the effective phacoemulsification time used in cataract surgery and postoperative outcomes between the Veritas and the Centurion Vision System. Methods A retrospective analysis was conducted on 90 eyes from 82 patients…

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Negative / Null Result ReportMedicine

Effective population size and N e /N ratio for two populations of Northern chamois (Rupicapra rupicapra) on the edge of the species' distribution range.

Jacobs S, Edelhoff H, Ebert C et al. · 2026 · BMC ecology and evolution

Effective population size (Ne) is a fundamental parameter in conservation genetics, providing relevant information on the adaptability and long-term viability of populations. In contrast, wildlife management strategies, particularly for…

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Negative / Null Result ReportMedicine

Missed Opportunities for Timely Diagnosis and Effective Therapeutic Management of Prolonged Fever: A Case Study of Confirmed Lassa Fever in N'Zérékoré, Guinea, 2022.

Cherif IS, Essis EML, Diallo MA et al. · 2026 · Case reports in infectious diseases

Background Lassa fever is a potentially fatal viral hemorrhagic disease caused by a ribonucleic acid (RNA) virus of the Arenaviridae family, endemic in West Africa. It is highly virulent and contagious in several countries, with a…

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Failed Experiment ReportMedicine

Operative Cultures Rarely Necessitate Change to Periprosthetic Joint Infection Antibiotic Plan Based on Monomicrobial Preoperative Aspiration.

Ducharme MT, Elmenawi KA, Poilvache H et al. · 2026 · The Journal of arthroplasty

Introduction Periprosthetic joint infections (PJI) are complex to manage and frequently result in prolonged hospitalization while awaiting outpatient antibiotic therapy coordination. Moving this work to the preoperative setting for…

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Negative / Null Result ReportOpen accessMedicine

Vessel diameter as a potential predictor of pulsed dye laser response in port wine stain: a retrospective exploratory reflectance confocal microscopy study.

Ran X, Shang Y, Yang X et al. · 2026 · Lasers in medical science

To investigate whether noninvasive reflectance confocal microscopy (RCM)-derived vascular parameters can serve as objective predictors of therapeutic response to pulsed dye laser (PDL) treatment in patients with port wine stain (PWS),…

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Negative / Null Result ReportOpen accessMedicine

The Median Effective Dose of Phenylephrine Infusion for Prevention of Spinal-Induced Hypotension During Cesarean Delivery in the 15° Left-Tilt vs. Supine Positions: A Randomised Control Study.

Yu XQ, Drzymalski DM, Qian J et al. · 2026 · Drug design, development and therapy

Background Left uterine displacement is presumed to decrease vasopressor requirements during cesarean delivery due to decreased aortocaval compression, but studies have been equivocal. Our primary aim was to determine the median effective…

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