Surveillance AFter Extremity Tumor surgerY (SAFETY) International Randomized Controlled Trial (SAFETY)

  • End date
    Dec 22, 2030
  • participants needed
  • sponsor
    McMaster University
Updated on 22 October 2022
Victoria Giglio
Primary Contact
Juravinski Hospital and Cancer Centre (6.3 mi away) Contact
+24 other location
ct scan
chest ct
cancer chemotherapy
primary extremity sarcoma
sarcoma of the extremity


Following treatment for a primary extremity sarcoma, patients remain at risk for the development of local and systemic disease recurrence. Metastasis (distant recurrence) to the lung is the most frequent single location of disease recurrence in sarcoma patients, occurring in almost half of all patients. Therefore, careful post-operative surveillance is an integral element of patient care. However, the detection of metastases does not necessarily affect long-term survival and may negatively impact quality of life. Surveillance strategies have not been well researched and have been identified as the top research priority in the extremity sarcoma field. Using a 2X2 factorial design to maximize efficiency and reduce overall trial costs, the SAFETY trial will randomize 830 extremity soft-tissue sarcoma (STS) patients to determine the effect of surveillance strategy on overall patient survival after surgery for a STS of the extremity by comparing the effectiveness of both surveillance frequency (every 3 vs. every 6 months) and imaging modality (CT scans vs. chest radiographs).


Post-treatment STS surveillance is an integral element of patient care. Although earlier detection of metastatic disease may improve long-term survival, no study has yet provided definitive evidence to support this assumption. A thorough systematic review of the literature has identified only a single limited randomized controlled trial (RCT) evaluating this clinical question, and surveys of sarcoma surgeons have determined that surgeons typically follow their patients based on the way in which they were trained. The orthopaedic oncology field has identified sarcoma surveillance strategy as the top research priority in the field. In order to fill the evidence gap in sarcoma surveillance, a large international RCT is required. The investigators, therefore, propose the Surveillance AFter Extremity Tumor surgerY (SAFETY) trial. In preparation for the SAFETY trial, the SAFETY investigators have completed the following preparatory work: A) establishment of a worldwide research collaborative group that spans 6 continents; B) collection of data from international sarcoma patients to determine their perceptions of sarcoma surveillance and their willingness to participate in a study in which randomization will determine their follow-up protocols; and C) the organization of a large Protocol Development Meeting with international and multidisciplinary participation, including sarcoma patient involvement, where critical aspects of the protocol were discussed and finalized.

The international, multi-center SAFETY trial will determine the effect of surveillance strategy on overall patient survival after surgery for a STS of the extremity by comparing the effectiveness of both surveillance frequency (every 3 vs. every 6 months) and imaging modality (CT scans vs. chest radiographs). Ultimately, the SAFETY trial will provide the necessary evidence to develop evidence-based surveillance guidelines, and is poised to have a significant impact on the post-operative care and outcomes of extremity soft-tissue sarcoma patients.

Condition Soft Tissue Sarcoma, Lung Metastases
Treatment Frequency: Every 3 Months, Frequency: Every 6 Months, Imaging Modality: Chest Radiograph (CXR), Imaging Modality: Chest CT
Clinical Study IdentifierNCT03944798
SponsorMcMaster University
Last Modified on22 October 2022


Yes No Not Sure

Inclusion Criteria

The patient is 18 years of age or older
The patient has been diagnosed with a primary extremity grade II or III soft-tissue sarcoma (STS)
The patient has undergone surgical excision of the tumor with curative intent and with no evidence of gross residual disease based on the pathology report
The patient has completed all planned neoadjuvant or adjuvant radiation and / or chemotherapy, if applicable
The tumor size is greater than or equal to (≥) five centimeters according to the pathology report or based on the pre-treatment MRI if neoadjuvant radiation and / or chemotherapy are given; and
The patient provides informed consent

Exclusion Criteria

The patient has metastases at initial presentation based on the radiology report of the initial thoracic imaging†
The patient has recently undergone surgical excision of a local recurrence
The patient has been diagnosed with one of the special sub-types, myxoid / round cell liposarcoma or extra-skeletal Ewing's sarcoma
The patient has been previously diagnosed with a genetic syndrome with an elevated risk of malignancy, such as Li-Freumeni Syndrome‡
The patient has been previously diagnosed with a co-morbid condition that has a life expectancy of less than (<) one year
The site-specific surveillance protocol for the patient's disease is not compatible with the study protocol (i.e., regular planned whole-body imaging with positron emission tomography [PET] scans)
Likely problems, in the judgment of the investigator, with the patient maintaining follow-up (with the specific reasoning requiring approval of the Methods Center)
The patient is currently enrolled in a study that does not permit co-enrolment; and
The patient has already been enrolled in the SAFETY trial
A second CT scan may be required to confirm that indeterminate nodules are false positives before the patient can be enrolled (provided that the second CT scan shows no evidence of metastatic disease)
Myxoid liposarcoma and extra-skeletal Ewing's sarcoma have different metastatic patterns, which necessitate different surveillance protocols
Individuals with Li-Freumeni Syndrome, or other genetic syndromes with an elevated risk of malignancy, appear to be at an elevated risk for radiation-induced cancers, so the use of CT scans should be limited
Clear my responses

How to participate?

Step 1 Connect with a study center
What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
  • Sign up as volunteer  to help accelerate the development of new treatments and to get notified about similar trials.

You are contacting

Investigator Avatar

Primary Contact


Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

Learn more

If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

Learn more

Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

Learn more

Similar trials to consider


Browse trials for

Not finding what you're looking for?

Every year hundreds of thousands of volunteers step forward to participate in research. Sign up as a volunteer and receive email notifications when clinical trials are posted in the medical category of interest to you.

Sign up as volunteer

user name

Added by • 



Reply by • Private

Lorem ipsum dolor sit amet consectetur, adipisicing elit. Ipsa vel nobis alias. Quae eveniet velit voluptate quo doloribus maxime et dicta in sequi, corporis quod. Ea, dolor eius? Dolore, vel!

  The passcode will expire in None.

No annotations made yet

Add a private note
  • abc Select a piece of text from the left.
  • Add notes visible only to you.
  • Send it to people through a passcode protected link.
Add a private note