[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-317048-105":3,"detail-sidebar-cat-0-en-105":81,"doc-detail-317048-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":74,"head_meta":76,"extra_data":78,"updated_unix":80},105,"en","thyroid-clinical-cases-medical-diagnostic-lessons","Thyroid Clinical Cases - Medical Diagnostic Lessons","","This document presents a series of clinical case studies authored by Dr. Colette George, focusing on common pitfalls in the diagnosis and management of thyroid disorders. Through three specific patient scenarios, the text illustrates the dangers of iatrogenic hyperthyroidism caused by improper T3 supplementation and the risks of treating hyperthyroidism without a confirmed diagnosis. The cases highlight the importance of interpreting TSH, Free T4, and T3 levels correctly to avoid unnecessary or harmful medication cycles.",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/healthcare/","Healthcare",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/thyroid-clinical-cases-medical-diagnostic-lessons/317048/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/thyroid-clinical-cases-medical-diagnostic-lessons/317048.png","ImageObject",300,407,{"name":42,"@type":43},"Pentious","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-22","2026-09-20",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",10,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"Why should isolated low T3 not be treated when TSH and Free T4 are normal?","Question",{"text":63,"@type":64},"Treatment with T3 leads to the suppression of TSH, which in turn inhibits the patient's endogenous production of T4, potentially causing an imbalance and leading to iatrogenic hyperthyroidism if further T4 is added.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"What is a key warning regarding the diagnosis of hyperthyroidism based on TSH levels?",{"text":68,"@type":64},"Physicians should be cautious about diagnosing hyperthyroidism based solely on a single low TSH value; a firm diagnosis requires follow-up testing with Free T4 and potentially T3 levels to confirm the condition.",{"name":70,"@type":61,"acceptedAnswer":71},"What occurred in the second clinical case study?",{"text":72,"@type":64},"A 23-year-old patient with a goiter was prematurely started on Carbimazole based on a low TSH, resulting in iatrogenic hypothyroidism, where the patient developed a larger goiter and severe thyroid deficiency.","https://schema.org",{"og:url":32,"og:type":75,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":77,"canonical":32},"index,follow",{"doc_id":79,"site_id":7},317048,1790458854,{"code":4,"msg":82,"data":83},"success",[84,88,92,96,101,106,110,115,120,123,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":93,"show_sort_weight":94,"slug":95},"Exam",70,"exam",{"id":97,"doc_module":4,"doc_module_name":25,"category_name":98,"show_sort_weight":99,"slug":100},5,"Comic",60,"comic",{"id":102,"doc_module":4,"doc_module_name":25,"category_name":103,"show_sort_weight":104,"slug":105},6,"Technology",50,"technology",{"id":107,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":108,"slug":109},7,40,"healthcare",{"id":111,"doc_module":4,"doc_module_name":25,"category_name":112,"show_sort_weight":113,"slug":114},8,"Research & Report",30,"research-report",{"id":116,"doc_module":4,"doc_module_name":25,"category_name":117,"show_sort_weight":118,"slug":119},9,"Religion & Spirituality",20,"religion-spirituality",{"id":118,"doc_module":4,"doc_module_name":25,"category_name":121,"show_sort_weight":118,"slug":122},"World Cup","world-cup",{"id":55,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":55,"slug":125},"Lifestyle","lifestyle",{"id":127,"doc_module":4,"doc_module_name":25,"category_name":128,"show_sort_weight":97,"slug":129},19,"General","general",{"code":4,"msg":82,"data":131},{"doc_id":79,"user_id":132,"nickname":42,"user_avatar":133,"doc_module":4,"category_id":107,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":139,"language":140,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":12,"update_tm":144,"read_time":145},1374404730887,"https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","Thyroid clinical  \ncases  \nDr. Colette George  \nCase 1  \nO 46 year old woman with weight gain and tiredness. Physical examination unremarkable  \nO TSH- 1.4 uiu/ml (0.4 – 4.0) O Free T4- 14.3 pmol/l (10.0-22.0) O Total T3- 1.0 nmol/l (1.3 – 2.6)  \nCase 1  \nO She is started on T3 (Cytomel)  \nO 2 months later  \nO TSH-0.03 uIU/ml ( 0.4-4.0) O FT4-8.0 pmol/l (10.0-22.0) O Total T3-2.3 nmol/l (1.3-2.6)  \nO Thyroxine-T4 is added  \nCase 1  \nO 2 months later, presents with weight loss and palpitations  \nO TSH- \u003C0.001 uIU/ml  \nO FT4- 24.0 pmol/l  \nO Total T3- 3.2 nmol/l  \nO IATROGENIC HYPERTHYROIDISM!!!  \nLesson 1  \nO Avoid treatment of isolated low T3 in the presence of normal TSH and Free T4  \nO T3 treatment will lead to appropriate suppression of TSH which will suppress endogenous T4 production.  \nO Low T4 in a patient treated with T3 is an appropriate response. Addition of T4 at this stage will likely lead to hyperthyroidism  \nCase 2  \nO 23 year old referred presents with goitre O TSH- 0.3 uIU/ml  \nO Free T4 (not done)  \nO Started on Carbimazole 20 mg bd  \nO 3 months later, goitre even bigger O TSH- >75 uIU/ml  \nO Free T4- \u003C5 pmol/l  \nLesson 2  \nO The problem- Iatrogenic hypothyroidism  \nO She was likely never thyrotoxic  \nO Thyrotoxicosis usually associated with a suppressed (not just a little low) TSH  \nO Be wary of diagnosing hyperthyroidism based on a single low TSH. Should be followed by T4+/-T3  \nO Do not treat for hyperthyroidism without a firm diagnosis  \nCase 3  \nO 45 year old woman presents with weight loss, heart racing, and frequent bowel movements.  \nCase 3-other possible clinical  \nsigns?  \nCase 3-other possible clinical  \nsigns?","cbCaiiqmCHWsPmkz","https://ap.wps.com/l/cbCaiiqmCHWsPmkz","pdf",1332858,39,"English","# Case 1: T3 Supplementation and Hyperthyroidism\n## Lesson 1: Management of Isolated Low T3\n# Case 2: Misdiagnosis of Thyrotoxicosis\n## Lesson 2: Risks of Iatrogenic Hypothyroidism\n# Case 3: Clinical Presentation of Thyroid Dysfunction","[{\"question\":\"Why should isolated low T3 not be treated when TSH and Free T4 are normal?\",\"answer\":\"Treatment with T3 leads to the suppression of TSH, which in turn inhibits the patient's endogenous production of T4, potentially causing an imbalance and leading to iatrogenic hyperthyroidism if further T4 is added.\"},{\"question\":\"What is a key warning regarding the diagnosis of hyperthyroidism based on TSH levels?\",\"answer\":\"Physicians should be cautious about diagnosing hyperthyroidism based solely on a single low TSH value; a firm diagnosis requires follow-up testing with Free T4 and potentially T3 levels to confirm the condition.\"},{\"question\":\"What occurred in the second clinical case study?\",\"answer\":\"A 23-year-old patient with a goiter was prematurely started on Carbimazole based on a low TSH, resulting in iatrogenic hypothyroidism, where the patient developed a larger goiter and severe thyroid deficiency.\"}]","Thyroid Clinical Cases - Medical Diagnostic Lessons | PDF",1789928214,98]