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The following cases are modeled on the interactive grand rounds approach. The questions within the activity are designed to test your current knowledge. After each question, you will be able to see whether you answered correctly and read evidence-based information that supports the most appropriate answer choice. The questions are designed to challenge you; you will not be penalized for answering the questions incorrectly. At the end of the activity, there will be a short post-test assessment based on the material presented.
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Elizabeth is a 67-year-old retired dance teacher who stays active with her children and grandchildren. She was diagnosed with thyroid cancer 15 years ago and underwent a total thyroidectomy. Final pathology showed a 3.1-cm papillary thyroid tumor with extrathyroidal extension and 2 involved lateral cervical lymph nodes. She received adjuvant radioactive iodine (RAI) and was then monitored closely by her endocrinologist.
Three years ago, during a routine surveillance appointment, her thyroglobulin (Tg) levels had increased and she underwent ultrasound and computed tomography (CT) with contrast of her neck and chest. Small nodules in her chest were observed and RAI imaging was performed, showing the new nodules were RAI avid. She was again treated with RAI, and the post-treatment scans showed modest uptake. Initially, her Tg levels decreased, but then within 6 months, her Tg levels began to increase. Initial imaging showed stability of the pulmonary nodules, but then after a year, they started to grow. Six months ago, her Tg doubling time became < 6 months and the nodules were increasing further.
Elizabeth was referred to a medical oncologist and a needle biopsy of one of the pulmonary lesions was performed, confirming metastatic papillary thyroid carcinoma. She is asymptomatic and otherwise healthy, with no major comorbidities. Her history and initial workup are summarized in Table 1.
Demographics/ patient Information |
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Medical history |
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Initial workup |
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BMI = body mass index; ECOG PS = Eastern Cooperative Oncology Group performance status; TSH = thyroid stimulating hormone.