Abstract
We discuss two cases of unsuspected metastatic thyroid carcinoma of Hurthle cell type, presenting as subcutaneous masses in the occipital scalp and supra-acetabular region of the right ilium; clinically suspected to be a lipoma and a vascular tumour, respectively. These two cases were initially investigated by fine-needle aspiration cytology. In case 1, a definitive diagnosis of metastatic Hurthle cell carcinoma was made based on cell block preparation and positive immunohistochemical stains for thyroglobulin and thyroid transcription factor-1. Case 2 was reported as suggesting an oncocytic process, metastatic Hurthle cell lesion. The filter preparations from both cases showed compact sheets and individual large polygonal cells with voluminous granular cytoplasm, eccentric nuclei with minimal atypia and bland chromatin. Scattered haemosiderin-laden macrophages and cystic debris were also identified in both cases. These cases are of interest as the bland cytologic features may lead to an erroneous benign diagnosis. Immunohistochemistry aids the definitive diagnosis of metastatic Hurthle cell carcinoma of thyroid especially when the presence of a previous thyroid lesion is not communicated to the laboratory.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
