Cytodiagnosis Of Follicular Carcinoma Thyroid From Metastatic Sites: A report Of Three Cases

Background: Follicular thyroid carcinomas (FTC) usually have a relatively benign clinical course, with good long-term prognosis. The most common sites of metastases are lung and bone. Fine needle aspiration cytology (FNAC) plays an important role in the diagnosis and early detection of metastatic FTC. It is important to identify the presence of distant metastasis as it is the most important prognostic indicator (associated with 50% mortality). Case history: We report three cases who presented with multiple swellings and bony involvement at different sites. In all the three cases, aspiration cytology revealed the diagnosis of metastatic follicular thyroid carcinoma. Conclusion: Cytologic diagnosis of metastatic FTC has been reported rarely. Epithelial cells arranged in repitative microfollicular pattern aids in making the diagnosis of metastatic FTC. It’s significant as this has a direct bearing upon the management of the patient. Hence more awareness is required for both pathologist and clinicians regarding the diagnosis of metastatic FTC.