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PET or PET/CT for Uterine Cancer | |
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Description: |
Positron Emission Tomography (PET) imaging uses radiotracers that can reveal both anatomical and physiological information. The glucose analog, 2-[fluorine-18]-fluoro-2-deoxy-D-glucose (FDG) is useful in cancer imaging because it has been found that tumor cells show increased utilization of glucose compared to non-malignant tissue and is the most common radiotracer that is utilized. For certain malignancies PET scans have been shown to be more accurate than other non-invasive tests in detecting malignant disease. However, as with all diagnostic tests, PET scans do not detect cancer 100% of the time that cancer is present (a false negative test), nor do all positive PET scans represent the presence of malignant disease (a false positive test). A false negative test may occur because a critical volume of malignant cells is necessary for a PET scan to be positive. PET scans may be false positive in the presence of inflammation or granulomatous disease.
In the United States PET/CT is usually done by a dedicated scanner that allows both forms of imaging on a single table but it can also be done with fusion or registration.
Definitions
Screening – testing in the absence of an established or clinically suspected diagnosis
Diagnosis - testing based on a reasonable clinical suspicion of a particular condition or disorder
Diagnostic Workup – initial staging of documented malignancy
Management – testing to direct therapy of an established condition, which may include preoperative or postoperative imaging, or imaging performed to evaluate the response to nonsurgical intervention. In oncologic imaging, management applies to patients with measurable disease and to imaging performed before or after planned treatment intervention, therapy response, restaging or clinically suspected recurrence.
Surveillance – periodic assessment following completion of therapy. In oncologic imaging, surveillance applies to asymptomatic patients in remission and/or without measurable disease
Cannot be performed or is nondiagnostic – applies when the test:
Standard or conventional imaging: Refers to imaging that does not require a PET/CT. Depending on the clinical scenario and individual patient circumstances, this may include computed tomography, magnetic resonance imaging, ultrasound and/or scintigraphy.
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Policy/ Coverage: |
Act 583 applies to all contracts subject to AR state law (this includes fully insured contracts, self-funded church sponsored health plans, and self-funded state and local government sponsored health plans except the Arkansas State and Public School Employees program). For a list of the plans subject to AR state law, please see policy guidelines below.
As required by Act 583 of the Arkansas Legislature, positron emission tomography to screen for or to diagnose cancer in a patient upon the recommendation of the patient's physician when the patient has a prior history of cancer is covered when the following criteria are met:
a) Documentation of the malignancy by pathologic or equivalent report, and
b) Performed no more often than every 6 months, and
c) Ordered by or in consultation with a specialist trained in pediatric oncology for an individual under the age of 18 (given the enhanced risk of radiation exposure in young).
Special Note regarding “prior history of cancer”: In applying Act 583 to any PET scan prior approval or coverage decision for those fully-insured contracts and self-funded church or government plans to which Act 583 applies, the patient-member will be considered to have a “prior history of cancer” as referenced in Act 583 if the patient-member either (a) has active cancer at the time a prior approval request is submitted, as documented by a pathologic or equivalent report or (b) previously had cancer, whether or not in remission at the time the prior approval request is submitted, as documented by a pathologic or equivalent report.
For additional information, please see policy 2021004 (PET or PET/CT for Cancer Surveillance and Other Oncologic Applications)
Policy Guidelines
List of Plans subject to Act 583:
As stated above, this does not apply to Arkansas State and Public School Employee health plan participants and beneficiaries. For Arkansas State and Public School Employee health plan participants and beneficiaries, please see policy 2023025 (PET or PET/CT for Oncologic Applications for ASE/PSE Contracts) for additional information.
For Federal Employee Health Benefit Program and Medicare Advantage plan participants please use the appropriate policy set to review.
For other requests for PET or PET/CT scans, the following policy/coverage criteria applies:
Effective March 13, 2022
Meets Primary Coverage Criteria Or Is Covered For Contracts Without Primary Coverage Criteria
FDG-PET/CT for patients with uterine cancer (including uterine sarcoma) meets member benefit certificate primary coverage criteria that there be scientific evidence of effectiveness in improving health outcomes for patients for:
Does Not Meet Primary Coverage Criteria Or Is Investigational For Contracts Without Primary Coverage Criteria
PET/CT for patients with uterine cancer does not meet member benefit certificate primary coverage criteria that there be scientific evidence of effectiveness in improving health outcomes for any other indication not listed as covered above including but not limited to:
For contracts without primary coverage criteria, PET/CT for patients with uterine cancer is considered investigational and is not covered for any indication or any circumstance other than those listed above including but not limited to:
Investigational services are specific contract exclusions in most member benefit certificates of coverage.
Note: Standard or conventional imaging: Refers to imaging that does not require a PET/CT. Depending on the clinical scenario and individual patient circumstances, this may include computed tomography, magnetic resonance imaging, ultrasound and/or scintigraphy.
Effective Prior to March 13, 2022
Meets Primary Coverage Criteria Or Is Covered For Contracts Without Primary Coverage Criteria
PET or PET/CT in the detection of lymph node metastases related to uterine cancer meets member benefit certificate primary coverage criteria that there be scientific evidence of effectiveness.
For all fully insured contracts, all self-funded church-sponsored health plans, and all self-funded government-sponsored health plans (e.g., state and public-school employee plans), other than the Federal Employee Health Benefit Program and Medicare Advantage plans, as required by Act 583 of the Arkansas Legislature, please see ABCBS policy 2021004, Surveillance and Other PET Oncologic Applications.
PET or PET/CT for the assessment of endometrial cancer recurrence meets member benefit certificate primary coverage criteria that there be scientific evidence of effectiveness
For all fully insured contracts, all self-funded church-sponsored health plans, and all self-funded government-sponsored health plans (e.g., state and public-school employee plans), other than the Federal Employee Health Benefit Program and Medicare Advantage plans, as required by Act 583 of the Arkansas Legislature, please see ABCBS policy 2021004, Surveillance and Other PET Oncologic Applications.
Does Not Meet Primary Coverage Criteria Or Is Investigational For Contracts Without Primary Coverage Criteria
PET or PET/CT for all other indications related to uterine cancer does not meet member benefit certificate primary coverage criteria that there be scientific evidence of effectiveness.
For all fully insured contracts, all self-funded church-sponsored health plans, and all self-funded government-sponsored health plans (e.g., state and public-school employee plans), other than the Federal Employee Health Benefit Program and Medicare Advantage plans, as required by Act 583 of the Arkansas Legislature, please see ABCBS policy 2021004, Surveillance and Other PET Oncologic Applications.
For members with contracts without primary coverage criteria, PET or PET/CT for all other indications related to uterine cancer is considered investigational. Investigational services are specific contract exclusions in most member benefit certificates of coverage.
Effective prior to March 2018
Does Not Meet Primary Coverage Criteria Or Is Investigational For Contracts Without Primary Coverage Criteria
PET or PET/CT does not meet primary coverage criteria that there be scientific evidence of effectiveness for diagnosis, staging or restaging of uterine cancer.
For members with contracts without primary coverage criteria, PET or PET/CT is considered investigational for diagnosis, staging or restaging of uterine cancer.
Investigational services are specific contract exclusions in most member benefit certificates of coverage.
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Rationale: |
There is some evidence that Whole-body PET/CT is useful for (1) initial staging of cervical and endometrial cancer, posttherapy assessment, radiation therapy planning, and posttreatment surveillance of cervical cancer, and (2) assessment of recurrence of cervical, endometrial, or ovarian cancer in the presence of symptoms. It is also useful for staging and recurrence of uterine sarcomas, and for staging of vulvar and vaginal cancer (Oldan, 2016; Lai et al, 2007).
Park et al (2008) performed a comparative study of PET/CT with MRI in the pre op detection of primary lesions and lymph node (LN) and distant metastases in patients with uterine corpus cancer. In patients with uterine corpus cancer, PET/CT had moderate sensitivity, specificity and accuracy in detecting primary lesions and LN metastases, indicating that this method cannot replace surgical staging. The primary benefit of PET/CT is its sensitivity in detecting distant metastases and therefore may present an advantage in select patients who are poor candidates for surgical staging.
There has been evidence published that compare the imaging modalities used in evaluating endometrial cancer. Several studies report that magnetic resonance has a higher sensitivity and utility in evaluating myometrial invasion and lymph node involvement. Kinkel et al (1999) performed a meta-analysis comparing the utility of computed tomography (CT), ultrasonography (US), and magnetic resonance (MR) imaging in staging endometrial cancer and determined that contrast-enhanced magnetic resonance imaging (MRI) appears to be the best radiographic modality for detecting myometrial invasion or cervical involvement when compared with nonenhanced MRI, ultrasound, or computed tomography (CT). The majority of studies reported the sensitivity of enhanced MRI as approximately 80 to 90 percent (range 57 to 100 percent) for myometrial invasion. A study by Beddy et al (2012), has also concluded that contrast enhanced MR has a high diagnostic and staging accuracy in the assessment of myometrial invasion.
A study by Selman et al (2008) found MRI to be the best imaging modality, compared with CT or positron emission tomography (PET) with or without CT, for detecting lymph node metastases. However, the author also notes that preoperative imaging for this purpose still cannot replace surgical evaluation of lymph node involvement.
In 2009, a NCCN Task Force reported on the clinical utility of PET in a variety of tumor types with the following summary statement:
“Although uterine cancer is usually diagnosed at an early stage, it has the same tendency as ovarian cancer to spread as small nodal deposits for which PET has very low sensitivity. In a study of 30 patients, Suzuki et al (2007) found that preoperative FDGPET detected none of 5 cases of lymph node involvement of 0.6 cm or less. PET was more sensitive than CT or MRI in visualizing non-nodal extrauterine lesions or the primary lesion (Suzuki et al, 2007; Chao et al, 2006) but, similar to ovarian cancer, the problem is that up-front surgery is indicated for staging and treatment of uterine cancer. PET imaging does not currently preclude the need for surgical staging.” (Podoloff et al, 2009).
The Expert Panel on Women’s Imaging and Radiation Oncology for the American College of Radiology (2013) published clinical guidelines for the use if imaging in evaluation and follow-up of endometrial cancer (EC) with the following summary points:
Additionally, two studies have concluded that the evidence is insufficient to determine the role of FDG-PT/CT in uterine cancer. Basu (2009) performed a study of PET and PET-CT imaging of gynecological malignancies and found that FDG-PET imaging was not routinely employed in endometrial adenocarcinomas. Bhosale et al (2010) also studied the use of F-FDG PET in gynecologic malignancies other than ovarian and cervical cancer and concluded that the potential role of FDG-PET/CT in gynecologic malignancies such as endometrial cancer and uterine sarcomas has not been fully explored.
2017 Update
A literature search conducted through September 2017 did not reveal any new information that would prompt a change in the coverage statement.
2018 Update
Annual policy review completed with a literature search using the MEDLINE database through February 2018. The key identified literature is summarized below.
ENDOMETRIAL CANCER AND 18F-FDG-PET AND 18F-FDG-PET/CT
Bollineni et al published a systematic review and meta-analysis on the diagnostic value of 18FFDG-PET for endometrial cancer (Bollineni, 2016). The literature search, conducted through August 2015, identified 21 studies for inclusion in the meta-analysis: 13 on detection of lymph node metastases (n=861) and 8 on detection of endometrial cancer recurrence (n=378). Pooled sensitivity and specificity for 18F-FDG-PET for detecting lymph node metastases were 72% (95% CI, 63% to 80%) and 94% (95% CI, 93% to 96%), respectively. Pooled sensitivity and specificity for 18F-FDG-PET for detecting endometrial cancer recurrence following primary surgical treatment were 95% (95% CI, 91% to 98%) and 91% (95% CI, 86% to 94%), respectively.
The evidence supports the use of 18F-FDG-PET and 18F-PET/CT for the diagnosis, staging and restaging, or surveillance of endometrial cancer.
2019 Update
Annual policy review completed with a literature search using the MEDLINE database through February 2019. No new literature was identified that would prompt a change in the coverage statement.
2020 Update
A literature search was conducted through February 2020. There was no new information identified that would prompt a change in the coverage statement.
2021 Update
Annual policy review completed with a literature search using the MEDLINE database through January 2021. No new literature was identified that would prompt a change in the coverage statement.
2022 Update
A literature review was performed through September 2021. Following is a summary of the key literature to date.
DIAGNOSTIC WORKUP
The staging system most widely adopted for uterine cancer is the International Federation of Gynecology and Obstetrics (FIGO) system, although the American Joint Committee on Cancer TNM system is also used. MRI pelvis is the preferred modality for assessing the extent of local disease and extension into the cervix. (1, 2) For fertility-sparing therapy, an MRI pelvis is indicated prior to hormonal therapy and dilatation and curettage; a review comparing MRI to transvaginal ultrasound reported better sensitivity for evaluating myometrial invasion with MRI although statistically the two exams were equivalent.3 When evaluation of lymph nodes is required, both CT and MRI provide similar sensitivity and specificity.(4, 5) In several small studies, PET has been shown to be equivalent or moderately better for detecting nodal disease when compared to MRI and CT; however, these differences rarely affect the decision for lymphadenectomy. (6-11) As the majority of endometrial cancers are confined to the uterus (75%) and lymph nodes (10%), systemic imaging is reserved for high-risk patients. (12) In an international prospective trial, the negative predictive value for low-risk endometrial cancer was 97%. (13) There is insufficient data to recommend PET/CT for routine assessment. Based on the National Comprehensive Cancer Network (NCCN) uterine cancer guidelines, European Society for Medical OncologyEuropean Society of Gynecological Oncology-European Society for Therapeutic Radiology and Oncology Consensus, and American College of Radiology guidelines, additional imaging for metastatic workup is optional. (14-16)
MANAGEMENT
Follow-up imaging should be guided by patient symptoms, risk assessment, and clinical concern for recurrent or metastatic disease. For patients with endometrial carcinoma who have undergone fertility-sparing treatment, MRI pelvis with contrast is preferred after 6 months of failed medical therapy, especially if considering further fertility-sparing approaches. In a small prospective study from Korea, PET for suspected disease recurrence had a sensitivity, specificity, accuracy, positive predictive value, and negative predictive value of 100%, 83.3%, 96%, 95%, and 100%, respectively. PET/CT detected 3/24 (12.5%) recurrences in patients with elevated tumor markers but negative CT abdomen and pelvis findings. (17)
SURVEILLANCE
Following treatment for uterine sarcoma specifically, the NCCN recommends CT of the Chest, Abdomen and Pelvis every 3-6 months for the first 3 years, and then every 6-12 months for the next 2 years. (14) Otherwise, the National Comprehensive Cancer Network, American College of Radiology, and Society of Gynecologic Oncology do not recommend routine use of surveillance imaging. (14, 16, 18) The most important component for surveillance of asymptomatic uterine cancer is physician history and physical with vaginal cytology, as the vaginal cuff is the most common site of recurrence. Cancer antigen (CA) 125 may be used if initially elevated. In a systematic review by Fung et al., the overall risk of recurrence was 13% for all patients and 3% or less for patients at low risk. Approximately 70% of all recurrences were symptomatic. (19) In a retrospective study, recurrences in high-grade endometrial carcinomas were discovered by symptoms 56% of the time and physical exam 18% of the time. Surveillance CT only detected 15% of asymptomatic recurrences. (20) Limited data is available for MRI and PET/CT in surveillance of asymptomatic patients.18 In a small prospective study, PET detected asymptomatic uterine cancer recurrence in only 4% of patients.17A retrospective study evaluating adherence to Society of Gynecological Oncology guidelines resulted in an appreciable decline in CT imaging, CA125, and clinical exams with no effect on outcomes. (21)
Current References
2023 Update
Annual policy review completed with a literature search using the MEDLINE database through September 2022. No new literature was identified that would prompt a change in the coverage statement.
NCCN Guidelines for Uterine Neoplasms (Version 2022) reviewed with no change from Version 2021 with regard to PET applications in Uterine Neoplasms.
2024 Update
Annual policy review completed with a literature search using the MEDLINE database through September 2023. No new literature was identified that would prompt a change in the coverage statement.
NCCN Guidelines for Uterine Neoplasms (Version1.2024) reviewed with no change from Version 2022 with regard to PET applications in Uterine Neoplasms.
2025 Update
Annual policy review completed with a literature search using the MEDLINE database through December 2024. No new literature was identified that would prompt a change in the coverage statement.
NCCN Guidelines for Uterine Neoplasms (Version 1.2024) reviewed with no change to PET applications.
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CPT/HCPCS: | |
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References: |
American College of Radiology (ACR) Expert Panel on Women’s Imaging and Radiation Oncology.(2013) Evaluation and Follow-up of Endometrial Cancer. 2013 version. ACR Appropriateness Criteria. Available at https://acsearch.acr.org/docs/69459/Narrative/ Antonsen SL, Jensen LN, Loft A, et al.(2013) MRI, PET/CT and ultrasound in the preoperative staging of endometrial cancer—a multicenter prospective comparative study. Gynecol Oncol 2013; 300-308. Available @ http://www.ncbi.nlm.nih.gov/pubmed/23200916. Basu S, Li G, Alavi, A.(2009) ET and PET-CT Imaging of Gynecological Malignancies: Present Role and Future Promise. Expert Rev Anticancer Ther. 2009;9(1):75-96. Beddy P, Moyle P, Kataoka M, Yamamoto AK, Joubert I, Lomas D, Crawford R, Sala E.(2012) Evaluation of depth of myometrial invasion and overall staging in endometrial cancer: comparison of diffusion-weighted and dynamic contrast-enhanced MR imaging. Radiology. 2012;262(2):530. Bhosale P, Iyer R, Jhingran A, Podoloff D.(2010) PET/CT Imaging in Gynecologic Malignancies Other than Ovarian and Cervical Cancer. PET Clin. 2010 Oct;5(4):463-75. doi: 10.1016/j.cpet.2010.07.005. Epub 2010 Aug 11. Bollineni VR, Ytre-Hauge S, Bollineni-Balabay O, et al.(2016) High diagnostic value of 18F-FDG PET/CT in endometrial cancer: systematic review and meta-analysis of the literature. J Nucl Med. Jun 2016;57(6):879-885. PMID 26823564 Chao A, Chang TC, Ng KK, et al.(2006) 18F-FDG PET in the management of endometrial cancer. Eur J Nucl Med Mol Imaging 2006;33:36–44. Kinkel K, Kaji Y, Yu KK, Segal MR, Lu Y, Powell CB, Hricak H.(1999) Radiologic staging in patients with endometrial cancer: a meta-analysis. Radiology. 1999;212(3):711. Lai CH, Yen TC, Chang TC.(2007) Positron emission tomography imaging for gynecologic malignancy. Curr Opin Obstet Gynecol. 2007 Feb;19(1):37-41. National Comprehensive Cancer Network(2022) NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines®) for Uterine Neoplasms (Version 1.2022). Available at http://www.nccn.org. ©National Comprehensive Cancer Network, 2022. Oldan JD, Patel PS.(2016) Positron Emission Tomography/Computed Tomography for Gynecologic Malignancies. Obstet Gynecol Surv. 2016 Sep;71(9):545-56. PMID: 27640609. Park JY, Kim EN, Kim DY, Suh DS, Kim JH, Kim YM, Kim YT, Nam JH.(2008) Comparison of the validity of magnetic resonance imaging and positron emission tomography/computed tomography in the preoperative evaluation of patients with uterine corpus cancer. Gynecol Oncol. 2008;108(3):486. Podoloff DA, Advani RH, Allred C, et al.(2009) NCCN Task Force Report: Clinical Utility of PET in a Variety of Tumor Types. J Natl Compr Canc Netw 2009;7 (Suppl 2):S1–23. Selman TJ, Mann CH, Zamora J, Khan KS.(2008) A systematic review of tests for lymph node status in primary endometrial cancer. BMC Womens Health. 2008;8:8. Suzuki R, Miyagi E, Takahashi N, et al.(2007) Validity of positron emission tomography using fluoro-2-deoxyglucose for the preoperative evaluation of endometrial cancer. Int J Gynecol Cancer 2007;17:890–896. |
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Group specific policy will supersede this policy when applicable. This policy does not apply to the Wal-Mart Associates Group Health Plan participants or to the Tyson Group Health Plan participants.
CPT Codes Copyright © 2025 American Medical Association. |