# Society of Surgical Oncology

Source: https://onco.cc/institutions/sso/  
OnCo record `sso` (Institution). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

The international society of cancer surgeons, publisher of Annals of Surgical Oncology and co-author of the margin and de-escalation guidelines that changed breast and melanoma surgery.

## Summary

Founded in 1940 as the James Ewing Society, the SSO represents surgical oncologists worldwide, publishes Annals of Surgical Oncology and runs the annual SSO International Conference on Surgical Cancer Care. Its joint SSO-ASTRO consensus on breast-conserving surgery margins ('no ink on tumour') reduced re-excisions, and its guidelines with ASCO on sentinel node biopsy and melanoma surgery translated MSLT-II into practice. SSO accredits complex general surgical oncology fellowships and its Breast Surgical Oncology and Complex General Surgical Oncology training programmes, and it partners with ESSO and the Asian and Latin American societies on global surgical oncology.

## Fields

- Kind: Institution
- Last checked: 2026-09-09
- Also known as: SSO; James Ewing Society
- City: Rosemont, IL, US
- Type: consortium
- Website: https://www.surgonc.org

## Sources

- SSO: https://www.surgonc.org

## Connected records

- cancers: [HR-positive / HER2-negative breast cancer](https://onco.cc/cancers/breast-hr-positive/), [Melanoma](https://onco.cc/cancers/melanoma/), [Sarcomas (soft tissue, bone, GIST)](https://onco.cc/cancers/sarcoma/)
- fronts: [Surgery & Interventional](https://onco.cc/fronts/surgery/)
- technologies: [Fluorescence-guided surgery](https://onco.cc/technologies/fluorescence-guided-surgery/), [HIPEC / PIPAC (intraperitoneal chemotherapy)](https://onco.cc/technologies/hipec/), [Robotic & minimally invasive surgery](https://onco.cc/technologies/robotic-surgery/), [Sentinel lymph node biopsy](https://onco.cc/technologies/sentinel-node/)
- institutions: [American Society for Radiation Oncology](https://onco.cc/institutions/astro/), [American Society of Clinical Oncology (ASCO)](https://onco.cc/institutions/asco/), [European Society of Surgical Oncology](https://onco.cc/institutions/esso/)
- trials: [MSLT-II](https://onco.cc/trials/mslt-ii/)
- people: [Kenneth K. Tanabe](https://onco.cc/people/kenneth-tanabe/), [Monica Morrow](https://onco.cc/people/monica-morrow/), [Selwyn M. Vickers](https://onco.cc/people/selwyn-vickers/), [Tari A. King](https://onco.cc/people/tari-king/), [Timothy J. Eberlein](https://onco.cc/people/timothy-eberlein/)
- bottlenecks: [Surgery and radiotherapy cure most, get least](https://onco.cc/bottlenecks/b-surgery-radiation-innovation/)
- journals: [Annals of surgical oncology](https://onco.cc/journals/annals-of-surgical-oncology/)

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JSON: https://onco.cc/api/v1/entities/sso.json