Related Experiment Videos
Amyloid goiter: radiological study in a case presenting hypothyroidism
E Ishimura1, T Okamura, H Masaki
1Second Department of Internal Medicine, Osaka City University Medical School, Japan.
Hormone and Metabolic Research = Hormon- Und Stoffwechselforschung = Hormones Et Metabolisme
|January 1, 1996
Summary
This study presents a rare case of amyloid goiter linked to rheumatoid arthritis, causing hypothyroidism. Absent 3-hour thallium-201 chloride uptake may help diagnose amyloid goiter in hypothyroidism.
Area of Science:
- Endocrinology
- Rheumatology
- Pathology
Background:
- Rheumatoid arthritis (RA) is a chronic inflammatory disease.
- Amyloidosis can affect various organs, including the thyroid.
- Hypothyroidism is a potential complication of thyroid dysfunction.
Observation:
- A 52-year-old female with a 15-year history of RA presented with fatigue and a large goiter.
- Laboratory tests revealed primary hypothyroidism.
- Biopsies confirmed AA-type amyloid deposition in the kidneys, gastric mucosa, and extensively in the thyroid.
Findings:
- Imaging studies (CT, MRI, iodine/technetium scintigraphy) were similar to chronic thyroiditis.
- Thallium-201 chloride scintigraphy showed absent uptake at 3 hours, distinguishing it from chronic thyroiditis.
- Levothyroxine replacement therapy successfully treated the hypothyroidism.
Implications:
- This case highlights amyloid goiter as a cause of hypothyroidism in RA patients.
- Absent 3-hour thallium-201 chloride uptake may be a specific diagnostic marker for differentiating amyloid goiter from hypothyroidism due to chronic thyroiditis.
- Early diagnosis and appropriate management are crucial for improving patient outcomes.