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The mystic thyroid nodule: A cytologist's confront
Hr Vanisri1, K Vani, Cs Sheela Devi
1Department of Pathology, JSS Medical College, A Constituent College of JSS University, Mysore, India.
Journal of Cytology
|September 8, 2011
Summary
Metastatic thyroid cancer is often undetected until autopsy. This case highlights a rare instance of isolated metastatic renal cell carcinoma (RCC) to the thyroid, diagnosed preoperatively.
Area of Science:
- Oncology
- Pathology
- Nephrology
Background:
- Metastatic thyroid carcinoma is frequently asymptomatic and discovered post-mortem.
- Renal cell carcinoma (RCC) is the predominant secondary malignancy in the thyroid, accounting for 56% of cases.
- Differentiating primary thyroid tumors from metastatic disease preoperatively poses a diagnostic challenge.
Observation:
- A 65-year-old woman presented with a thyroid mass.
- The mass was initially suspected to be a primary thyroid neoplasm.
- Fine needle aspiration (FNA) cytology was performed for diagnosis.
Findings:
- Fine needle aspiration cytology successfully diagnosed metastatic renal cell carcinoma.
- Histopathological examination confirmed the diagnosis of isolated metastatic RCC to the thyroid.
- The patient's condition was amenable to surgical resection.
Implications:
- Early and accurate preoperative diagnosis of metastatic thyroid cancer is crucial.
- Fine needle aspiration cytology is a valuable tool for distinguishing secondary thyroid malignancies.
- Prompt surgical intervention can be curative for localized metastatic disease to the thyroid.
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