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Nasolacrimal Duct Obstruction on ¹³¹I SPECT/CT: Atypical False-positive Paranasal Radioiodine Uptake as a Complication of Single-dose RAI Treatment

10.4274/mirt.galenos.2021.68926

• Nuh Filizoğlu
• Kevser Öksüzoğlu
• Salih Özgüven
• Onur Buğdaycı
• Tanju Yusuf Erdil

Received Date: 10.03.2021 Accepted Date: 08.07.2021 Mol Imaging Radionucl Ther 2022;31(3):234-236 PMID: 36268911

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Nasolacrimal duct obstruction (NLDO) is a rare complication after radioiodine therapy and may cause false positive ¹³¹I uptake at the point of obstruction in ¹³¹I whole body scan. Here, we report a 59-year-old female patient with papillary thyroid cancer treated with total thyroidectomy followed by ¹³¹I therapy. ¹³¹I whole body scan revealed focal uptake in the head. Single photon emission computed tomography/computed tomography (CT) showed focal uptake at the right proximal nasolacrimal duct. The ophthalmologic examination and the diagnostic maxillofacial CT confirmed the diagnosis of NLDO.

Keywords: 131I, radioiodine therapy, nasolacrimal duct obstruction, thyroid cancer

Ethics

Informed Consent: Informed consent form was obtained.

Peer-review: Externally peer-reviewed.

Authorship Contributions

Surgical and Medical Practices: N.F., K.Ö., S.Ö., O.B., T.Y.E., Concept: N.F., T.Y.E., Design: N.F., T.Y.E., Data Collection or Processing: N.F., K.Ö., Analysis or Interpretation: N.F., T.Y.E., Literature Search: N.F., T.Y.E., Writing: N.F., S.Ö.

Conflict of Interest: No conflict of interest was declared by the authors.

Financial Disclosure: The authors declared that this study received no financial support.

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