Incidental Finding of Brain Metastasis on SPECT/CT in a Thyroid Cancer Patient

甲狀腺癌患者全身掃描影像是陰性而附加電腦斷層的單光子放射電腦斷層掃描偶然檢測有腦轉移

謝志芳(Jih-Fang Hsieh) ； 陳俊偉(Robert Tan) ； 李將瑄(Chiang-Hsuan Lee) ； 吳志順(Chih-Shun Wu)

《核子醫學暨分子影像雜誌》 30卷2期 (2017/06) Pp. 94-99

https://doi.org/10.6332/ANMMI.3002.007

摘要

Radioiodine whole-body scintigraphy is indispensable for the management of patients with well-differentiated thyroid carcinoma, who had undergone total or near-total thyroidectomy. Recently, the additional imaging of SPECT/CT has been increasingly utilized for optimal interpretation. Previous literatures reported SPECT/CT had incremental diagnostic values compared to planar scintigraphy on therapeutic management of thyroid cancer. We present a case of a thyroid cancer with right parietal brain metastasis detected on SPECT/CT which is negative on the 3-mCi diagnostic ^(131)I whole body scan. To the best of our knowledge, there’s neither a similar case of brain metastasis with a positive ^(131)I SPECT/CT nor has a negative planar image in a patient with well-differentiated thyroid carcinoma been reported in the literature.

關鍵字

^(131)I ； Planar image ； SPECT/CT ； well-differentiated thyroid carcinoma

並列摘要

碘-131全身掃描以甲狀腺癌的處置方法，已常規使用於經接受全甲狀腺切除或近全甲狀腺切除之分化良好的甲狀腺癌患者。近期，附加電腦斷層的單光子放射電腦斷層掃描(SPECT/CT)之應用已經逐漸增加，並產生了理想的結果。文獻上曾報導有關甲狀腺癌的治療處置方法，附加電腦斷層的單光子放射電腦斷層掃描(SPECT/CT)與平面閃爍掃描比較，前者可以增加診斷價值。我們報告最近進行之一案例，經3毫居里碘-131診斷性之全身掃描影像是陰性而立即進行之附加電腦斷層的單光子放射電腦斷層掃描(SPECT/CT)檢測有右頂葉腦轉移。盡我們所知，碘-131附加電腦斷層的單光子放射電腦斷層掃描(SPECT/CT)顯示腦轉移為陽性而平面影像為陰性的分化良好的甲狀腺癌患者案例，這種情況，尚未在文獻報導。

並列關鍵字

碘-131 ； 平面閃爍掃描 ； 附加電腦斷層的單光子放射電腦斷層掃描 ； 分化良好甲狀腺癌