Coexistent thyroid and lung cancers resembling “flip‐flop” phenomenon

Abstract

Abstract The “flip‐flop” phenomenon may be present in differentiated progressive thyroid cancer. A high suspicion index must be maintained when this phenomenon coexists with a high tumor burden, due to the risk of the appearance of distinct tumors.

Keywords

• “flip‐flop’’ phenomenon
• dedifferentiate thyroid cancer
• differentiated thyroid cancer
• FDG‐PET/CT
• iodine/FDG uptake
• radioiodine therapy