Background: Papillary thyroid cancer (PTC) accounts for 90% of the thyroid malignancies with predominance in females. Distant metastasis is usually seen in lungs and bones. The treatment of metastatic papillary cancer thyroid is total/near total thyroidectomy followed by radioactive iodine (RAI) ablation. Lung metastasis shows a good response to RAI therapy.
Case Presentation: We describe a case of a 22-year-old female, referred to the nuclear medicine department after surgery for RAI ablation. The patient was diagnosed case of PTC. The first dose of 100 mCi of RAI under steroid cover was given. The post-therapy scan showed bilateral pulmonary metastasis. However, follow-up I-131 whole-body imaging after 2 years showed no evidence of functioning thyroid tissue/metastasis.
Conclusion: PTC with lung metastasis has a good prognosis and better survival in young patients treated with RAI. A single dose of
RAI (I-131) may cure extensive lung metastasis.
Key words: Papillary CA thyroid, Pulmonary metastasis, RAI ablation, Case report
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