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Published on: July 21, 2018
Well-differentiated fetal adenocarcinoma of the lung: cytomorphologic features on fine-needle aspiration with
Lori Proctor1, Andrew L Folpe, Annette Esper
1Department of Pathology and Laboratory Medicine, Emory University, Atlanta, Georgia, USA.
Abstract:
Well-differentiated fetal adenocarcinoma (WDFA), also known as low grade adenocarcinoma of the fetal lung type, is a rare pulmonary neoplasm now considered to be a variant of lung adenocarcinoma rather than a type of pulmonary blastoma. Upregulation of the Wnt signaling pathway with subsequent aberrant nuclear/cytoplasmic beta-catenin expression has been recently described in these tumors providing a possible pathogenetic role for this gene in WDFA. We describe the cytomorphologic findings of a case of WDFA in a 36-yr-old female patient and emphasize the diagnostic utility of aberrant nuclear/cytoplasmic expression of beta-catenin as an adjunct to the correct preoperative recognition of this tumor on aspiration cytology.
