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Cryoablation Versus Lumpectomy in Early-Stage Breast Cancer

Cryoablation as Alternative for Lumpectomy in Early-Stage Breast Cancer: The CRYSTAL Trial

Status
Not yet recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07483996
Acronym
CRYSTAL
Enrollment
938
Registered
2026-03-19
Start date
2026-04-01
Completion date
2038-12-31
Last updated
2026-03-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Early-Stage Breast Cancer

Keywords

Breast Cancer, Early-Stage Breast Cancer, Borstkanker, Vroegstadium Borstkanker

Brief summary

The goal of this randomised controlled trial is to compare ipsilateral breast cancer recurrence rates in patients with early-stage breast cancer between patients treated with breast conserving surgery and patient treated with percutaneous cryo-ablation.

Interventions

In this trial, the IceCure Prosense Cryoablation System will be used to execute the percutaneous cryoablation procedure.

PROCEDUREBreast-conserving surgery

Breast-conserving surgery

Sponsors

Franciscus Gasthuis & Vlietland (Hospital)
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

This is a multicenter randomized phase III non-inferiority trial with two arms: percutaneous cryoablation and breastconserving surgery. The randomization ratio is 1:1, stratified by center, tumor size (\< / \> 1 cm) and Bloom Richardson grade. All eligible patients will consecutively be included and randomized. Crossover is only possible for patients allocated to the cryoablation arm.

Eligibility

Sex/Gender
FEMALE
Age
60 Years to No maximum
Healthy volunteers
No

Inclusion criteria

1. Women 2. Age \> 60 years 3. Postmenopausal (no menstrual period for at least 12 months or in case of an intra-uterine device (IUD) hormone levels that indicate the menopause: follicle stimulating hormone (FSH) \> 20 IE/l and estradiol \< 100 pmol/l) 4. Histopathological confirmed primary invasive ER+/HER2- type breast cancer 5. Bloom Richardson grade 1 or 2 (low or intermediate malignancy grade) 6. Unilateral and unifocal breast cancer 7. A clinical T1N0M0 tumor (≤ 2cm and N0 on US and/or MRI), without distant metastases. The largest diameter measured will be used to determine eligibility. 8. Tumor should be visible and well delineated (all borders of the tumor should be visible) on ultrasound at diagnosis and during the procedure. 9. Sufficient knowledge of the Dutch language to complete the questionnaires 10. To be able to give written informed consent

Exclusion criteria

1. History of invasive breast cancer 2. Breast augmentation 3. BRCA-1 or 2 gene mutation carrier 4. Lobular carcinoma 5. Triple negative breast cancer 6. Multifocality 7. HER2-neu overexpressing tumors 8. Lymph vascular invasion (LVI) on core needle biopsy or histopathological confirmed after lumpectomy 9. Indication for neoadjuvant systemic therapy 10. Intraductal component \> 25% of the diameter of the invasive tumor on MRI, complete area of the primary tumor should not exceed 2cm. 11. Allergic to local anesthetics 12. Electrical devices and/or implants that are not compatible with MRI 13. Current severe breast infection 14. Uncorrectable coagulopathy 15. Hemodynamic instability 16. Respiratory instability 17. Refraining from adjuvant radiotherapy 18. Indication for oncoplastic surgery (surgical volume replacement techniques e.g. LICAP)

Design outcomes

Primary

MeasureTime frameDescription
Ipsilateral breast cancer recurrenceUntil 5 years after the interventionProportion of ipsilateral breast cancer recurrences (IBTR) after 5 years in both study arms.

Secondary

MeasureTime frameDescription
Complication RateWithin 30 days after the interventionThe proportion of complications within 30 days (percentage Clavien-Dindo classification).
Regional breast cancer recurrencesUntil 5 years after the interventionRegional breast cancer recurrences, defined as clinically, radiologically, and/or histologically confirmed recurrence in regional lymph nodes.
Disease Free Survivaluntil 15 years after the interventionDisease free survival (DFS) is defined as the time from date of intervention to the first occurrence of recurrent disease of the same histological characteristics as the primary tumor and in the same quadrant as the primary tumor
Overall Survivalthrough study completion, an average of 15 yearsOverall survival (OS) is defined as the time from breast cancer diagnosis to death from any cause.
Cosmetic Outcomesat baseline, 6 months and 1 year after the interventiono assess cosmetic outcomes following treatment with cryoablation or lumpectomy using the BCTOS-13 and BREAST-Q questionnaires at specified follow-up visits, and objective assessment using BCCT.core software. Higher scores indicate better cosmetic outcomes.
Hospital-related costsUntil 5 years after the interventionHospital-related costs, including expenses made due to additional findings on inclusion MRI
Out-of-hospital (non)-medical costsUntil 5 years after the interventionTo assess out-of-hospital medical and non-medical costs and productivity losses using the iMTA Medical Consumption Questionnaire (iMCQ) and iMTA Productivity Cost Questionnaire (iPCQ) questionnaires.
Generic Health-related Quality of LifeAt baseline, 6 months after the intervention, 1 and 5 years after the interventionTo assess general health-related quality of life using the EQ-5D-5L questionnaire, with higher scores indicating better health status
Disease-specific quality of lifeAt baseline, 6 months after the intervention, 1 and 5 years after the interventionTo assess cancer-specific quality of life using the EORTC QLQ-C30 and EORTC QLQ-BR23 questionnaires. Higher scores indicate better functioning or greater symptom burden depending on the subscale.
Complete ablation rate2 weeks after the intervention (cryoablation)On magnetic resonance imaging
Predictive value of MRIuntil 5 years after the interventionThe negative predictive-, and diagnostic value of MRI for incomplete ablation
Proportion of reinterventionsFor the duration of the study, most likely within 2 weeks after the interventionFor both study arms.
Radiation ToxicityAt baseline, prior to radiation, 1 year and 5 years after the interventionThe proportion of acute and long-term breast irradiation toxicity (radiation dermatitis, superficial or deep connective tissue fibrosis, chest wall pain, localized edema) using common toxicity criteria (CTCAE v5.0) and cosmetic questionnaires
Incremental cost-utility ratio (ICUR)Until 5 years after the interventionTo estimate the incremental cost-utility ratio (ICUR). Higher ICUR values indicate higher costs per quality-adjusted life year (QALY) gained.

Contacts

CONTACTLinda Riks, MD
l.riks@franciscus.nl010 - 893 6010
PRINCIPAL_INVESTIGATORT.M.A.L. GE Klem, MD, PhD

Franciscus Gasthuis & Vlietland

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 20, 2026