ArticleHistology and histopathology2026
A clinicopathological study of eight cases presenting a Biphasic structure: A distinct variant of pulmonary carcinoma.
Article in Histology and histopathology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Biphasic structures, which are composed of outer basal cells and inner glandular cells, are frequently indicative of salivary gland-type tumors or benign lesions, such as bronchial adenoma, within the lung. However, the occurrence of a biphasic structure in lung cancer is rarely reported and can lead to significant challenges and confusion in diagnosis, particularly in biopsy specimens. In our study, we collected eight lung epithelial tumors that presented with a distinct biphasic structure component and examined their clinicopathological characteristics. Histological examination revealed that the biphasic structure component, often intermingled with conventional squamous cell carcinoma or adenocarcinoma, was defined by basal cells encircling the glandular epithelium. Immunohistochemical analysis demonstrated a distinctive peripheral p40 staining pattern in the biphasic structure component. Genetic analysis identified driver mutations in seven out of eight patients, which are typically associated with conventional pulmonary adenocarcinomas, including
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