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**Overview**: Anti-Thyroid Antibodies Panel**Introduction**: The Anti-Thyroid Antibodies Panel is a diagnostic tool designed to screen for thyroid autoantibodies using serum samples. In India, autoimmune thyroid diseases (AITD) affect millions, with anti-TPO positivity in 10-20 percent of women and anti-Tg in Hashimoto's thyroiditis (prevalence ~5-10 percent), and Graves' disease common in young adults. High prevalence in iodine-sufficient areas, postpartum thyroiditis, and association with PCOS/infertility. Symptoms include fatigue, weight changes, goiter, palpitations, or infertility. High morbidity from underdiagnosis in rural women, limited endocrinology access, and delayed levothyroxine/immunosuppressive therapy leading to hypothyroidism complications or Graves' crisis. Per endocrinology and immunology practices aligned with ICMR guidelines, the test employs immunoassay for antibody detection over 1-2 days with high sensitivity/specificity, valuable for confirming autoimmune etiology and monitoring. This diagnostic falls under autoimmune thyroid screening and targets patients with suspected thyroid disorders, addressing accurate detection to guide therapy. With elevated morbidity due to underdiagnosis, the test supports public health efforts by enabling precise identification, facilitating management, and reducing complications. Its serum-based approach ensures reliable detection.**Other Names**: Thyroid Ab Pnl.**FDA Status**: FDA approved, CLIA certified for immunology/endocrinology, compliant with 2025 standards.**Historical Milestone**: Established for AITD diagnosis; in India, prominence with thyroid disorder burden.**Purpose**: The test screens for 2 parameters including anti-TPO to guide thyroid autoimmune assessment, confirm Hashimoto's/Graves', inform treatment.**Test Parameters**: 1. Anti-Thyroid Peroxidase, 2. Anti-Thyroglobulin.**Pretest Condition**: No fasting required; patients should report fatigue, weight changes, goiter, palpitations, or infertility.**Specimen**: 3 mL serum in 1 SST, transported within specified times to maintain sample viability.**Sample Stability at Room Temperature**: 8 hours with proper handling to preserve analyte integrity, ensuring reliable test performance.**Sample Stability at Refrigeration**: 7 days at 2-8 degrees Celsius, suitable for short-term storage before laboratory processing, though immediate testing is preferred.**Sample Stability at Frozen**: 6 months at -20 degrees Celsius, allowing long-term storage for retesting, though freezing may affect some analytes.**Medical History**: Patients should provide details on thyroid symptoms, family history of thyroid/autoimmune disorders, pregnancy, or medications.**Consent**: Written informed consent is required, detailing the test's purpose, potential risks of untreated thyroid autoimmunity including hypothyroidism or infertility, benefits of early detection, and minimal discomfort from venipuncture.**Procedural Considerations**: The test involves sample processing using immunoassay by trained personnel to ensure sterile technique, avoid hemolysis, and interpret results within 1-2 days using provided controls. Laboratories must maintain a controlled environment, adhere to quality assurance protocols, and store kits according to manufacturer specifications to ensure reliability.**Factors Affecting Result Accuracy**: Delays beyond stability periods, improper storage conditions, hemolysis, or concurrent illnesses can affect results. Correlation with clinical evaluation or additional testing is recommended to confirm findings.**Clinical Significance**: Positive antibodies indicate autoimmune thyroid disease, necessitating specialist input. Negative may require follow-up if symptoms persist.**Specialist Consultation**: Endocrinologists should be consulted for management.**Additional Supporting Tests**: TSH, free T4, ultrasound for confirmation.**Test Limitations**: May miss early cases or require correlation with function tests; comprehensive approach required.**References**: Indian Journal of Endocrinology 2024, Thyroid Autoimmunity Studies India 2023. |
