A rare false-positive uptake: orbital conjunctival cyst mimicking metastasis on post-therapeutic radioiodine scan in thyroid cancer

Key Points

• To discuss a rare occurrence of a false-positive uptake in a post-therapeutic radioiodine scan for thyroid cancer that resembled metastasis.
• Clinical vignette analysis of a specific case
• Evaluation of imaging techniques and interpretations
• Assessment of potential diagnostic errors
• Identification of an orbital conjunctival cyst as the cause of false-positive uptake
• Confirmation of no metastatic disease despite initial scan indications
• Emphasis on differential diagnosis in post-therapeutic imaging procedures