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Pulmonary metastasis of cribriform‐morular variant of thyroid carcinoma mimicking primary adenocarcinoma of the lung: A potential pitfall
Author(s) -
Laforga Juan B.,
Pedro Teresa,
Gasent Joan M.
Publication year - 2020
Publication title -
diagnostic cytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.417
H-Index - 65
eISSN - 1097-0339
pISSN - 8755-1039
DOI - 10.1002/dc.24312
Subject(s) - medicine , pathology , cribriform , adenocarcinoma , lung , thyroid carcinoma , immunohistochemistry , metastasis , carcinoma , thyroid , cancer
Cribriform‐morular variant of papillary thyroid carcinoma (CMV‐TC) shows a peculiar mixture of follicular, cribriform, papillary, trabecular, and solid patterns with squamoid morules. Ocassionally, lung metastasis may be interpreted incorrectly as primary lung adenocarcinoma. We illustrate a case of pulmonary meastasis of CMV‐TC mimicking a primary adenocarcinoma, 7 years after diagnosis of CMV‐TC. The lung metastases may be easily missed if the pathologist is unaware of the patient's prior history and a limited immunohistochemical panel (CK7 and TTF‐1) is used. The histologic and immunohistochemical (β‐catenin+, ER+, PR+, TTF‐1 +, and CK7+) findings were diagnostic of CMV‐TC and ensured adequate treatment.