Cerianna™ (fluoroestradiol F 18) Injection

A PET imaging agent for ER+ metastatic or recurrent breast cancer
At a glance

High diagnostic accuracy

FES binds to the estrogen receptor with high affinity¹.

Closing the gap in diagnostic dilemmas

FES offers another imaging option for patients with ER+ disease that is occult or hard to assess on standard imaging.

Reshaping the diagnostic landscape

FES allows for more diagnostic insights, redefining and expanding the capabilities of imaging for breast cancer patients.

Clear diagnosis, more confident treatment

FES may help guide change in management for ER+ breast cancer patients².

Cerianna (FES) PET: Helping to close the gap in diagnostic dilemmas

In the complex landscape of breast cancer management, uncertainty can delay treatment decisions. Cerianna (FES) PET allows for more specific diagnostic insights, redefining and expanding the capabilities of imaging for ER+ breast cancer patients.

Whether addressing ER discordance between primary and metastatic disease or identifying hard-to-detect lesions, Cerianna may deliver actionable insights that empower oncologists to make confident, timely decisions. By combining high diagnostic accuracy with a unique mechanism of action, Cerianna may help resolve diagnostic dilemmas, helping patients receive the most optimal treatment at the right time.

Cerianna (FES) PET has a unique mechanism of action

Cerianna, F18 fluoroestradiol (FES), is a radiolabeled estrogen analog that is used with positron emission tomography (PET) imaging to determine the ER status of recurrent and metastatic breast cancer tumors³. Cerianna binds to estrogen receptors allowing for the visualization of ER expression in vivo⁴.

Uptake of Cerianna is not specific for breast cancer and may occur in a variety of ER-positive tumors (uterus and ovaries).

High diagnostic accuracy

The IMPACT-MBC study, a 200-patient prospective trial, evaluated the diagnostic performance of FES PET imaging in determining estrogen receptor (ER) status in metastatic breast cancer (MBC). The study demonstrated a positive predictive value (PPV) of 93%, negative predictive value (NPV) of 85%, a sensitivity of 95% and a specificity of 80%, supporting the clinical utility of FES PET as a non-invasive tool to assess ER status. These findings highlight the potential of Cerianna (FES) PET to aid in treatment planning for ER+ breast cancer patients⁵.

*The F18 fluoroestradiol administered in this study was not equivalent to the FDA-approved formulation of Cerianna.

Distinct mode of action that may help inform clinical decisions

F18 fluoroestradiol and FDG PET images in a MBC treatment responder and non-responder*†⁶

cerianna-patient-1-v2
Patient 1 (anterior/superior) responded to treatment with an AI and a CDK 4/6 inhibitor*6
cerianna-patient-2-v2
Patient 2 (anterior/superior) did not respond to treatment with an AI and a CDK 4/6 inhibitor*6
*AI = aromatase inhibitor, CDK = cyclin-dependent kinase, FDG = 18F-fluorodeoxyglucose, Tx = treatment.

†Upper row responder: Baseline FDG PET (A) showed pathological uptake in axillary lymph nodes (right side) and in nearly all vertebrae and pelvic bones. Image B showed the baseline F18 fluoroestradiol PET with pathological ER expression in the axial skeleton (including vertebrae, pelvic bones, proximal humeri and femora) and in axillary lymph nodes (right side). After 8 weeks, the FDG PET (C) showed almost complete metabolic response (just some slightly elevated uptake in the axillary lymph nodes). The patient had been on treatment for more than 70 weeks. Lower row non-responder: Baseline FDG PET (D) showed pathological uptake in multiple skeletal lesions. Image E showed the baseline F18 fluoroestradiol PET with only some increased ER expression in thoracic vertebrae. After 8 weeks, the FDG PET (F) showed no metabolic response, even some increase in the pathologic uptake in the multiple skeletal lesions6.

Images from a prospective, single center, feasibility study that aimed to explore whether baseline F18 fluoroestradiol PET discordance and F18 fluoroestradiol uptake were correlated with outcome and response to concomitant treatment with an AI and a CDK 4/6 inhibitor. Thirty patients with ER+ MBC were included in the study, including 87% who received at least one previous line of ET in the metastatic setting6.

*The F18 fluoroestradiol administered in this study was not equivalent to the FDA-approved formulation of Cerianna.

Guidelines for using FES PET/CT

SNMMI appropriate use criteria7


Assessing ER status in lesions that are difficult to biopsy, or when biopsy is nondiagnostic. After progression of metastatic disease, for considering second line of endocrine therapy. At initial diagnosis of metastatic disease, for considering endocrine therapy. Detecting ER status when other imaging tests are equivocal or suspicious.

NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines®)

FES PET/CT is included as an imaging option for systemic staging of ER+ recurrent / stage IV (M1) disease in the NCCN Guidelines® for Breast Cancer

Recurrent/stage IV (M1) disease

Clinical Stage
Referenced with permission from the NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines®) for Breast Cancer V.1.2026. © National Comprehensive Cancer Network, Inc. 2026. All rights reserved. Accessed February 6, 2026. To view the most recent and complete version of the guideline, go online to NCCN.org.

NCCN makes no warranties of any kind whatsoever regarding their content, use or application and disclaims any responsibility for their application or use in any way.

NCCN Category 2A: Based upon lower-level evidence, there is uniform NCCN consensus (≥85% support of the Panel) that the intervention is appropriate.

Review our guideline update Press Release
Access the Guidelines for FES PET/CT PDF

Cerianna production site locations

Cerianna is produced and distributed by PETNET Solutions Inc, A Siemens Healthineers company. Available at 19 radiopharmacies throughout the United States.

Publications

Access these publications to learn how FES PET may fit into your clinical practice.

Interpreter Training

Enhance your expertise interpreting Cerianna (FES) PET/CT with our comprehensive training programs, from foundational education led by Dr. Gary Ulaner to advanced peer-to-peer training for complex cases with DocPanel.

REFERENCES
  1. Katzenellenbogen JA. The quest for improving the management of breast cancer by functional imaging: the discovery and development of 16α-[18F]fluoroestradiol (FES), a PET radiotracer for the estrogen receptor, an historical review. Nucl Med Biol. 2021;92:24-37. doi:10.1016/j.nucmedbio.2020.02.007.
  2. Ryu J, Han S, Shin E, et al. Impact of 18F-FES PET/CT on clinical decisions in the management of recurrent or metastatic breast cancer. J Nucl Med. 2024;65(11):1689-1694. doi:10.2967/jnumed.124.267913.
  3. Cerianna (FES) PET Prescribing Information. Arlington Heights, IL: GE HealthCare, 2025.
  4. Chae SY, Ahn SH, Kim S-B, Han S, Lee SH, Oh SJ, et al. Diagnostic accuracy and safety of 16α-[18F]fluoro-17β-oestradiol PET-CT for the assessment of oestrogen receptor status in recurrent or metastatic lesions in patients with breast cancer: a prospective cohort study. Lancet Oncol. 2019;20(4):546-555.
  5. Van Geel JJL, Boers J, Elias SG, et al. Clinical validity of 16α-[18F] Fluoro-17β-Estradiol positron emission tomography/computed tomography to assess estrogen receptor status in newly diagnosed metastatic breast cancer. J Clin Oncol. 2022;40(31):3642-3652. doi: 10.1200/JCO.22.00400.
  6. Boers J, Venema CM, de Vries EFJ, Glaudemans AWJM, Kwee TC, Schuuring E, et al. Molecular imaging to identify patients with metastatic breast cancer who benefit from endocrine treatment combined with cyclin-dependent kinase inhibition. Eur J Cancer. 2020;126:11-20.
  7. Ulaner et al. Summary: Appropriate use criteria for estrogen receptor–targeted PET imaging with 16α-[18F]-fluoro-17β-fluoroestradiol. J Nucl Med. 2023;64(3):351-354. doi:10.2967/jnumed.122.265847.

Have a question? We would love to hear from you.

Important Safety Information

INDICATIONS AND USAGE:

CERIANNA is indicated for use with positron emission tomography (PET) imaging for the detection of estrogen receptor (ER)-positive lesions as an adjunct to biopsy in patients with recurrent or metastatic breast cancer.

 

Limitations of Use:

Tissue biopsy should be used to confirm recurrence of breast cancer and to verify ER status by pathology. CERIANNA is not useful for imaging other receptors, such as human epidermal growth factor receptor 2 (HER2) and the progesterone receptor (PR).

 

Important Safety Information

 

CONTRAINDICATIONS

•  None.

 

WARNINGS AND PRECAUTIONS

 

Risk of Misdiagnosis

Inadequate Tumor Characterization and Other ER-Positive Pathology

•   Breast cancer may be heterogeneous within patients and across time. CERIANNA images ER and is not useful for imaging other receptors such as HER2 and PR. The uptake of fluoroestradiol F 18 is not specific for breast cancer and may occur in a variety of ER-positive tumors that arise outside of the breast, including from the uterus and ovaries. Do not use CERIANNA in lieu of biopsy when biopsy is indicated in patients with recurrent or metastatic breast cancer.

 

False Negative CERIANNA Scan

•   A negative CERIANNA scan does not rule out ER-positive breast cancer. Pathology or clinical characteristics that suggest a patient may benefit from systemic hormone therapy should take precedence over a discordant negative CERIANNA scan.

 

Radiation Risks

•   Diagnostic radiopharmaceuticals, including CERIANNA, expose patients to radiation. Radiation exposure is associated with a dose-dependent increased risk of cancer. Ensure safe drug handling and patient preparation procedures (including adequate hydration and voiding) to protect patients and

health care providers from unintentional radiation exposure.

 

Pregnancy Status

•   Assessment of pregnancy status is recommended in females of reproductive potential before administering CERIANNA.

 

ADVERSE REACTIONS

 

•   In Clinical Trials (n=1207) the most common adverse reactions seen occurred at a rate < 1% were injection-site pain and dysgeusia.

 

USE IN SPECIFIC POPULATIONS

 

Pregnancy

Risk Summary

•   All radiopharmaceuticals, including CERIANNA, have the potential to cause fetal harm depending on the fetal stage of development and the magnitude of radiation dose. Advise a pregnant woman of the potential risks of fetal exposure to radiation from administration of CERIANNA.

 

•   There are no available data on CERIANNA use in pregnant women. No animal reproduction studies using fluoroestradiol F 18 have been conducted to evaluate its effect on female reproduction and embryo-fetal development.

 

•   The estimated background risk of major birth defects and miscarriage for the indicated populations is unknown. All pregnancies have a background risk of birth defects, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2-4% and 15-20%, respectively.

 

Lactation

Risk Summary

•   There are no data on the presence of fluoroestradiol F 18 in human milk, or its effects on the breastfed infant or milk production. Lactation studies have not been conducted in animals. Advise a lactating woman to avoid breastfeeding for 4 hours after CERIANNA administration in order to minimize radiation exposure to a breastfed infant.

 

Pediatric Use

•  The safety and effectiveness of CERIANNA in pediatric patients have not been established.

 

Geriatric Use

  • Clinical studies of fluoroestradiol F 18 injection did not reveal any difference in pharmacokinetics or biodistribution in patients aged 65 and over.

 

DRUG INTERACTIONS

 

   Systemic Endocrine Therapies that Bind to ER

 

  • Drugs that bind to the ER, including SERMs and SERDs, may compete with the binding of fluoroestradiol F18 and may reduce detection of ER-positive lesions with CERIANNA.

     

  • Before administration of CERIANNA, discontinue drugs that bind to the ER, such as SERMs and SERDs, for at least 5 biological half-lives: ( e.g. elacestrant for 11 days, tamoxifen for 8 weeks and fulvestrant for 28 weeks).

 

To report SUSPECTED ADVERSE REACTIONS, contact GE HealthCare at 800 654 0118 (option 2 then option 1) or by email at GPV.drugsafety@gehealthcare.com or FDA at 800 FDA 1088 or     www.fda.gov/medwatch

JB07319US February 2026