Evaluation Study of L-T3 Utility in the Follow-up of Patients With Thyroid Cancer

April 8, 2014 updated by: Patrice Perron

L-T3 Preparation for I131 Whole Body Scintigraphy: A Randomized Controlled Trial

To compare the hypothyroid state in patients with thyroid cancer prepared either by placebo or L-T3 following L-T4 withdrawal in preparation for whole body scintigraphy. To evaluate the time needed for TSH elevation (> 30 mUI/L) on placebo vs. L-T3.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Patients with well differentiated thyroid cancer (DTC) need whole-body scintigraphy (WBS) and thyroglobulin (Tg) measurement in order to detect recurrence. Classically, withdrawal from levothyroxine (L-T4) during 4-6 weeks is needed for TSH elevation (> 30mUI/L), to allow iodine uptake and Tg production. As a result, patients become hypothyroid with impaired quality of life and a potential for tumour flare-up. Recombinant hTSH before WBS prevents hypothyroidism but is not yet approved for radioiodine treatment and is an expensive therapy. L-T3 substitution during the first 2-3 weeks of withdrawal is an alternative used empirically to prepare patients; however, no data exists to prove its benefit upon reducing hypothyroidism.

Objectives: 1) To compare the hypothyroid state in patients prepared either by placebo or L-T3 following L-T4 withdrawal. 2) To evaluate the time needed for TSH elevation (> 30 mUI/L) on placebo vs. L-T3.

Method: At the time of L-T4 withdrawal or after thyroidectomy, patients with DTC awaiting WBS or radioiodine treatment were randomized in two groups (double-blind): L-T3 (50 mg qd) or an identical placebo for 3 weeks, after which treatment was stopped for 2 weeks. A validated questionnaire of signs and symptoms of hypothyroidism (Billewicz's scale) was administered every 2 weeks until the WBS. TSH, fT4 and fT3 were measured weekly.

Study Type

Interventional

Enrollment (Anticipated)

70

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Canada
    • Quebec
      • Sherbrooke, Quebec, Canada, J1H 5N4
        • Centre Hospitalier Universitaire de Sherbrooke

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Patients with well-differentiated thyroid cancer, with total thyroidectomy
  • 18 y.o. or older

Exclusion Criteria:

  • Use of rhTSH for Whole Body Scintigraphy preparation
  • Non stable cardiac arrythmias
  • Any condition impairing TSH elevation(glucocorticoid use, hypopituitarism)
  • Allergy to Liothyronine
  • Inability to give a consent

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Evaluation of the hypothyroid status by the Billewicz questionnaire.

Secondary Outcome Measures

Outcome Measure
The time to reach an acceptable TSH elevation.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Patrice Perron

Collaborators

Theramed co.

Investigators

  • Principal Investigator: Rébecca Leboeuf, MD, Universite de Sherbrooke
  • Principal Investigator: Marie-France Langlois, MD, Universite de Sherbrooke
  • Principal Investigator: Patrice Perron, MD, Universite de Sherbrooke
  • Principal Investigator: Jean Verreault, MD, Universite de Sherbrooke

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

September 1, 2003

Primary Completion (Actual)

May 1, 2005

Study Completion (Actual)

May 1, 2005

Study Registration Dates

First Submitted

September 19, 2005

First Submitted That Met QC Criteria

September 19, 2005

First Posted (Estimate)

September 22, 2005

Study Record Updates

Last Update Posted (Estimate)

April 9, 2014

Last Update Submitted That Met QC Criteria

April 8, 2014

Last Verified

July 1, 2005

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • CRC 03-52-R1

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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