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Scintigraphic hot nodules and thyroid carcinoma
Clinical Nuclear Medicine
|February 1, 1987
Summary
Hot nodules identified on iodine-123 scans can indicate thyroid cancer. Further investigation revealed that all three hot nodules in this study were indeed malignant, including follicular and papillary thyroid cancer variants.
Area of Science:
- Endocrinology
- Nuclear Medicine
- Oncology
Background:
- Thyroid nodules are common, and their evaluation often involves radioisotope imaging.
- Hot nodules, defined as those that concentrate radioiodine, were traditionally considered less likely to be malignant.
Observation:
- This study reviewed three patients with "hot" nodules detected via iodine-123 (I-123) scintigraphy.
- All three "hot" nodules were subsequently confirmed to harbor thyroid malignancy upon histopathological examination.
Findings:
- Two of the identified thyroid cancers were follicular thyroid carcinoma.
- One case presented as a follicular variant of papillary thyroid carcinoma.
Implications:
- The findings challenge the traditional assumption that "hot" nodules are benign.
- Clinicians should maintain a high index of suspicion for malignancy in "hot" thyroid nodules.
- Iodine-123 scintigraphy remains a valuable tool, but results must be interpreted in clinical context.