ArticleInternal medicine (Tokyo, Japan)2026
A Rare Case of Amyloid Goiter Suspected to Be Malignant on Imaging Findings.
Article in Internal medicine (Tokyo, Japan), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
A 67-year-old man was diagnosed with Hashimoto's thyroiditis, and replacement therapy with levothyroxine was initiated. Ten years later, although the patient was euthyroid, ultrasonography showed an increase in goiter size and a significant decrease in overall echogenicity with scattered high-echo areas. Computed tomography revealed diffuse low-density areas with no contrast effect in the thyroid parenchyma and partial high-density areas, indicating possible malignancy. However, a core needle biopsy revealed an amyloid light-chain (AL) κ-type amyloid goiter. Because serum immunoprecipitation electrophoresis showed IgG κ-type M-protein, the diagnosis was secondary amyloidosis. It is important to consider amyloid goiter with imaging findings, as in this case.
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