Anatomic pathology selected abstracts
November 2023—Claudin-4 is a sensitive and specific marker for carcinoma in effusion cytology. The authors examined the diagnostic use of claudin-4 versus MOC-31 and Ber-EP4 by comparing their sensitivity, specificity, positive predictive value, and negative predictive value in differentiating carcinoma from mesothelioma and benign/mesothelial hyperplasia in effusion specimens. They conducted a retrospective study on a cohort of 229 cytology specimens, including 211 effusion fluid and 18 fine-needle aspiration specimens. The cytologic categories included 134 carcinoma, 28 mesothelioma, 46 indefinite (suspicious and atypical), and 21 benign.