TSI
Abbreviation with 2 meanings
| Stands for | Thyroid-stimulating immunoglobulin |
|---|---|
| Meanings | 2 |
| Categories | Medical, Education & Academia |
TSI has two meanings. It stands for Thyroid-stimulating immunoglobulin (endocrinology & diabetes) or Texas Success Initiative (standardized test).
Meanings of TSI at a glance
| # | TSI stands for | Context |
|---|---|---|
| 1 | Thyroid-stimulating immunoglobulin | Medical › Endocrinology & Diabetes |
| 2 | Texas Success Initiative | Education & Academia › Standardized Test |
1. Thyroid-stimulating immunoglobulin
Medical · Endocrinology & Diabetes Abbreviations
Autoantibody that binds and activates the TSH receptor on thyroid cells, driving excess hormone production and gland growth in Graves' disease. A positive TSI confirms Graves' as the cause of hyperthyroidism without a radioactive uptake scan.
Example: Hyperthyroid with diffuse goiter, TSI 4.2 times upper limit: Graves' disease confirmed.
TSI is one kind of TSH receptor antibody (TRAb); some assays measure all binding antibodies rather than only stimulating ones. Because the antibodies cross the placenta, high levels in late pregnancy can cause hyperthyroidism in the newborn. Falling levels during treatment suggest a better chance of remission.
2. Texas Success Initiative
Education & Academia · Standardized Test Abbreviations
Texas program that determines whether students entering public colleges and universities are ready for college-level reading, writing and math, using the TSI Assessment 2.0 (TSIA2) unless a student is exempt. Students who miss the benchmarks take developmental or corequisite courses.
Example: Her SAT scores exempted her from the TSI, so she enrolled directly in college algebra.
Exemptions include qualifying SAT or ACT scores, military service and some prior college coursework. The TSIA2, developed with the College Board, launched in 2021 on the Accuplacer platform. Results affect course placement, not admission.
Related abbreviations
More endocrinology & diabetes abbreviations
- ACTH – Adrenocorticotropic hormone
- ADH – Antidiuretic hormone
- AI – Adrenal insufficiency
- AID – Automated insulin delivery
- AVP-D – Arginine vasopressin deficiency
- CAH – Congenital adrenal hyperplasia
- CGM – Continuous glucose monitor
- CS – Cushing's syndrome
See all 64 endocrinology & diabetes abbreviations →
More standardized test abbreviations
- TIMSS – Trends in International Mathematics and Science Study
- TOEFL – Test of English as a Foreign Language
- TOEIC – Test of English for International Communication
- TOPIK – Test of Proficiency in Korean
- UCAT – University Clinical Aptitude Test
- USMLE – United States Medical Licensing Examination
- WASSCE – West African Senior School Certificate Examination
- WISC – Wechsler Intelligence Scale for Children
See all 106 standardized test abbreviations →
This entry is for general education and is not medical advice. Abbreviation use varies between institutions; always confirm in context.