SIOP Annual Congress 2027
International Society of Paediatric Oncology
- Dates
- September 8–11, 2027 Confirmed
- Location
- International Convention Centre Sydney (ICC Sydney), Sydney, Australia
- Expected attendance
- About 2,550
- Therapy or topic area
- Oncology, Pediatrics
About the meeting
The 59th Congress of the International Society of Paediatric Oncology (SIOP 2027) will be held in Sydney, Australia. SIOP is the only global multidisciplinary society entirely devoted to paediatric and adolescent cancer, and the annual congress brings together physicians, nurses, psychologists, surgeons, and oncology specialists worldwide.
Based on the official SIOP website. Abstracts are published in Pediatric Blood & Cancer.
Key dates for SIOP 2027
| Milestone | Date | Status |
|---|---|---|
| Abstract submission deadline | March 10, 2027 | Estimated |
| Late-breaking abstract deadline | July 14, 2027 | Estimated |
| Meeting | September 8–11, 2027 | Confirmed |
Subscribe to all SIOP dates
Google Calendar Outlook.com Microsoft 365 Download for Apple / Outlook app (.ics)Planning ahead: SIOP's abstract deadline usually falls about 6 months (182 days) before the meeting (182 days in 2026).
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Submitting an abstract to SIOP 2027
- Membership required
- Yes 2026 rules
- Previously presented work
- Work must not have been accepted by or published in a peer-reviewed journal at the time of submission. 2026 rules
SIOP hasn't published its 2027 guidelines yet. Until it does, items marked 2026 rules show the 2026 requirements. Summarized from SIOP's guidelines, checked October 27, 2026. The official guidelines always take precedence.
Common questions
When is the SIOP 2027 abstract deadline?
The abstract submission deadline is March 10, 2027 (estimated), and late-breaking abstracts are due July 14, 2027 (estimated).
When and where is SIOP 2027?
SIOP 2027 takes place September 8–11, 2027 at International Convention Centre Sydney (ICC Sydney) in Sydney, Australia. The dates are confirmed.
How many people attend SIOP?
About 2,550 people are expected at SIOP 2027.
How can our team cover SIOP efficiently?
harmony Insights turns the full SIOP program into a searchable catalog within 24 hours of abstract titles being posted, scored against your scientific interests. See how it works.
Past editions
| Year | Meeting dates | City | Abstract deadline |
|---|---|---|---|
| 2026 | September 15–18, 2026 | San Antonio | March 17, 2026 |
| 2025 | October 8–11, 2025 | Amsterdam | Not recorded |
| 2024 | October 17–20, 2024 | Honolulu | Not recorded |
| 2023 | October 11–14, 2023 | Ottawa | Not recorded |
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Last updated November 6, 2026. Source: Orbytel Group conference database. Dates marked estimated are our projections, not the organizer's.
SIOP abstracts are due in 124 days
The deadline is March 10, 2027 (estimated). Watch SIOP and we'll email you before it, whenever its dates change, and when the 2028 deadline is announced.