Occult carcinoma confirmed to be a diffuse sclerosing variant of papillary thyroid carcinoma with unusual immunohistochemical features: A pitfall of clinicopathological diagnosis
{{output}}
Immunocytochemistry in a 78-year-old man diagnosed as having systemic metastatic cancer of unknown primary origin revealed atypical cells positive for napsin A and TTF-1, suggesting adenocarcinoma of the lung. However, there was no evidence of a primary lesion... ...
