Abstract Background: Well differentiated thyroid tumor of uncertain malignant potential (WDTUMP) represents a true ‘‘gray zone’’ of ‘‘follicular patterned’’ thyroid lesions, that needs to be characterized in order to outright the diagnosis of carcinoma and avoid unnecessary aggressive treatment. Aim: To emphasize on the histomorphological criteria for more accurate diagnosis of WDT-UMP. Also to compare the immunohistochemical expression of CK19 ...
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