Evaluation of Thyroid Abnormity Incidence and Thyroid Toxicity During Chemotherapy Among Newly Diagnosed Breast Cancer

Study Overview
=================
Brief Summary
-----------------
Breast cancer is one of the most common cancers in China. Even though advances in the field of breast cancer therapeutics, chemotherapy remains the mainstay therapeutic modality. The cytotoxic therapies are generally associated with some immediate or otherwise delayed side effects, such as adverse effects on gastrointestinal, hepatic, renal and hematological systems. The effect of chemotherapy on endocrine system, however, is comparatively less envisaged. Several epidemiological studies show a positive association between plasma thyroid hormones levels and breast cancer risk. Thyroid dysfunction is emerging as a variably common endocrine toxicity of several anticancer drugs. Due to the scarcity of data on the functioning of thyroid gland during chemotherapy in a large scale group, the present study was aimed to investigate the incidence of thyroid abnormity in Chinese women with newly diagnosed breast cancer, and also the effects of chemotherapy on thyroid gland functions or structure in these breast cancer patients undergoing at least four cycles of chemotherapy.

Official Title
-----------------
A Prospective Study to Assess Both Thyroid Abnormity Incidence In Chinese Women With Newly Diagnosed Breast Cancer and Thyroid Toxicity of Breast Cancer Patients Undergoing Chemotherapy

Conditions
-----------------
Thyroid Gland, Breast Cancer Female

Intervention / Treatment
-----------------
* Drug: Chemotherapy


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Female patients with histologically or cytologically proven primary breast cancer; Age >18 years; ECOG Performance Status: 0-2; Life Expectancy: 3 months or more; No previous anti-cancer therapy; Be willing to undergo at least four cycles of anthracycline or taxane-based chemotherapy; Adequate hematological, liver, and kidney functions. Exclusion Criteria: Pregnancy or lactation; History of other malignancy or secondary breast cancer; History of thyroid disease; History of drug addiction or abuse; History of immunodeficiency disease; Treatment with drugs capable of influencing thyroid gland functions within 3 months prior to study entry; Nonmeasurable disease such as un-controlled diabetes, severe cardiovascular and cerebrovascular diseases; Current, recent (within 4 weeks prior to study entry), or planned participation in any other clinical trials; Inability to understand and agree to informed consent.

Ages Eligible for Study
-----------------
Minimum Age: 18 Years
Maximum Age: 85 Years

Sexes Eligible for Study
-----------------
Female

Study Plan
=================
How is the study designed?
-----------------

Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Observational group<br>Newly diagnosed breast cancer patients undergoing at least four cycles of chemotherapy | Drug: Chemotherapy<br>* Newly diagnosed breast cancer patients undergoing at least four cycles of chemotherapy.<br>|
| Control group<br>Healthy Volunteers | |

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of participants newly diagnosed with breast cancer | Rate of thyroid function (measured by chemiluminescence methods) or structure (measured by ultrasonic imaging) abnormity at the time of diagnosis and during chemotherapeutic period will be reported. | 1 week around the indicated detection point |