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ASCO
Medicine and clinical researchoncologyAmerican Society of Clinical Oncology
Abstract deadline (Anywhere on Earth unless the venue says otherwise) Confirmed
26 January 2027Free, in your browser, before the 26 January deadline: the length counted the way ASCO counts it, the sections, and numbers that disagree.
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- Edition
- 4–8 June 2027
- Where
- Chicago, USA
- Submission
- abstract
Source: asco.confex.com
Abstract rules
2,600 characters without spaces, counting the title, body and table. These are the 2026 rules; the 2027 ones are not published yet.
Character count: Do not exceed 2,600 characters including the abstract title, body, and table. The character count does not include spaces or author names or institutions. Official guidelinesCheck your abstract
Free, in your browser: the length counted the way this meeting counts it, the sections, and numbers that disagree.
ASCO 2025 in numbers
From a random sample of 300 of about 6,500 abstracts published in Journal of Clinical Oncology.
| Main topics | Share |
|---|---|
| Cancer Immunotherapy and Biomarkers | 7% |
| Breast Cancer Treatment Studies | 4% |
| Global Cancer Incidence and Screening | 4% |
| Lung Cancer Treatments and Mutations | 3% |
| Hepatocellular Carcinoma Treatment and Prognosis | 3% |
| CAR-T cell therapy research | 3% |
| Authors from | Share of abstracts |
|---|---|
| United States | 61% |
| China | 16% |
| Canada | 5% |
| United Kingdom | 5% |
| Pakistan | 5% |
| Spain | 5% |
The typical abstract used 97% of the 2,600-character limit, and 71% used more than nine tenths of it: many authors write close to the limit.
38% reported a 95% confidence interval and 41% a p-value.
| Kind of study (mentioned) | Share |
|---|---|
| Phase 1-3 trial | 25% |
| Retrospective | 25% |
| Randomised trial | 14% |
| Prospective | 13% |
| Real-world data | 11% |
| Meta-analysis | 6% |
How meetings like this are judged
Outside computer science, conferences are rarely ranked: the abstract is usually not the publication, and a meeting's standing comes from the society that runs it and who attends. What counts in evaluations is the journal the full paper appears in; see how venues are ranked.
More oncology deadlines
| Meeting | Deadline |
|---|---|
| AACRAACR Annual Meeting | 10 Nov 2026 |
| ASHASH Annual Meeting 2026 (late-breaking abstracts) | 28 Oct 2026 |
| ESCMID Global | 18 Nov 2026 |
| ADAADA Scientific Sessions | 5 Jan 2027 |
| EANEAN Congress | 14 Jan 2027 |
Writing the full paper as well? DeskReady checks the whole manuscript against itself: numbers against the tables, claims against the results, figures against their captions, every reference against the databases. The first check is free.
Check your paperCollected by DeskReady from the official site, checked 2026-10-17 (Data sources). Dates change: confirm on the official site before you submit. DeskReady is not affiliated with ASCO.