We updated the design of this site on December 18, 2017. Learn more.
ClinicalTrials.gov Menu

EC17 for Intraoperative Imaging for Parathyroidectomy

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT01996072
Recruitment Status : Completed
First Posted : November 27, 2013
Last Update Posted : March 20, 2018
Information provided by (Responsible Party):
Sunil Singhall, University of Pennsylvania

Brief Summary:

Primary hyperparathyroidism is a significant medical and public health problem in the world and affects approximately 100,000 new patients in the United States alone. If left untreated this can lead to renal stones, osteoporosis, fatigue, and depression. The best treatment for primary hyperparathyroidism is surgical parathyroidectomy. However surgical parathyroidectomy can be difficult due to the variant location of the parathyroid glands. Up to 5% of patients leave the operating room without surgical cure.

Primary hyperparathyroidism is an ideal disease to investigate intraoperative fluorescent imaging. This would allow surgeons to identify the parathyroid glands and resect the suspicious parathyroid glands. Folate receptor (FR) has been found to be over-expressed in parathyroid tissue and not thyroid issues. An ideal surgical treatment would combine FR-specific fluorescent tracers with intraoperative imaging. It is important to note that FR is expressed only in the proximal tubules of the kidneys, activated macrophages, and in the choroidal plexus. Thus, the false positive detection rate is expected to be extremely low.

A group well known to us in the Netherlands has completed a pilot study utilizing a folate-FITC conjugate in 12 patients with ovarian cancer. Another group of investigators in Mayo have subsequently performed this study on 20 more patients without any serious adverse events (personal communication). They report excellent sensitivity and specificity with this technique with only grade 1 side effects (allergic reaction). All side effects reversed when the injection was halted. Patients with a history of allergic reactions to insect bites should not participate (fluorescein is derived from the firefly insect, folate is an essential vitamin).

A fluorescent contrast agent (folate-FITC or EC17) will be used to determine if it will localize to the primary tumor nodule(s) or mass(es) of patients undergoing parathyroid surgery.

Condition or disease Intervention/treatment Phase
Primary Hyperparathyroidism Drug: EC17 Phase 1

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 10 participants
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: A Pilot & Feasibility Study of the Imaging Potential of EC17 in Subjects Undergoing Parathyroidectomy for Primary Hyperparathyroidism.
Study Start Date : November 2013
Primary Completion Date : September 2014
Study Completion Date : September 2014

Arm Intervention/treatment
Experimental: EC17 Injection Group
The group will receive a single dose of EC17, infused over 10 minutes, prior to surgery. Then, during surgery, the EC-17 will be imaged with a camera that the investigators have developed.
Drug: EC17
Other Name: Folate- FITC

Primary Outcome Measures :
  1. The ability of EC17 and the imaging system to detect FRA positive tumors during surgery conducted 2-4 hours post EC-17 administration. [ Time Frame: Within two to four hours of injection of EC17 ]

Secondary Outcome Measures :
  1. The number of participants that will have an adverse reaction to EC17 [ Time Frame: Day 1-Day 30 ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Adult patients over 18 years of age
  2. Patients presenting with primary hyperparathyroidism presumed to be resectable on pre-operative assessment
  3. Good operative candidate
  4. Subject capable of giving informed consent and participating in the process of consent.

Exclusion Criteria:

  1. Pregnant women as determined by urinary or serum beta hCG within 72 hours of surgery
  2. Patients with a history of anaphylactic reactions to Folate-FITC or insects
  3. Vulnerable patient populations

    1. Homeless patients
    2. Patients with drug or alcohol dependence
    3. Children and neonates
    4. Patients unable to participate in the consent process

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01996072

United States, Pennsylvania
Hospital of the University of Pennsylvania
Philadelphia, Pennsylvania, United States, 19104
Sponsors and Collaborators
University of Pennsylvania
Principal Investigator: Sunil Singhal, M.D. University of Pennsylvania

Responsible Party: Sunil Singhall, Assistant Proffesor of Medicine, Assistant Proffesor of Surgery, Director Thoracic Surgery Research Lab, University of Pennsylvania
ClinicalTrials.gov Identifier: NCT01996072     History of Changes
Other Study ID Numbers: 818060
818060 [UPenn IRB Protocol] ( Other Identifier: IRB )
First Posted: November 27, 2013    Key Record Dates
Last Update Posted: March 20, 2018
Last Verified: March 2018

Keywords provided by Sunil Singhall, University of Pennsylvania:
Primary hyperparathyroidism

Additional relevant MeSH terms:
Hyperparathyroidism, Primary
Parathyroid Diseases
Endocrine System Diseases