THE UTILITY OF IMMUNOHISTOCHEMISTRY IN DIFFERENTIATING METASTATIC PRIMARY SQUAMOUS CELL CARCINOMA OF THE THYROID FROM A PRIMARY LUNG SQUAMOUS CELL CARCINOMA

The Utility of Immunohistochemistry in Differentiating Metastatic Primary Squamous Cell Carcinoma of the Thyroid from a Primary Lung Squamous Cell Carcinoma

Primary squamous cell carcinoma of the thyroid gland (PSCCTh) and anaplastic thyroid Guitar Strings carcinoma with extensive squamous differentiation are rare entities which pose a diagnostic challenge in determining the primary site when presented as metastases.The difficulty in confirming a thyroid primary is further compounded by the aggressive

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