J Am Soc Cytopathol. 2014 Jan - Feb;3(1):21-28. doi: 10.1016/j.jasc.2013.08.225. Epub 2013 Oct 21.
Squamous cells in effusions: A study of 24 cases.
Journal of the American Society of Cytopathology
Laura J Adhikari, Camille T Elkins, Paul E Wakely
Affiliations
Affiliations
- Department of Pathology, Wexner Medical Center at The Ohio State University, Columbus, Ohio.
- Department of Pathology, Wexner Medical Center at The Ohio State University, Columbus, Ohio. Electronic address: [email protected].
PMID: 31051726
DOI: 10.1016/j.jasc.2013.08.225
Abstract
INTRODUCTION: Malignant squamous cells in serous effusions are rare. We present our experience with squamous cell carcinoma (SqCC) and benign squamous cells in effusions.
MATERIALS AND METHODS: Specimens were retrieved from our database using search codes as "squamous" within the final diagnosis under various serous effusions.
RESULTS: Twenty-nine specimens were recovered, and 5 of those were excluded. Of the 24 specimens, 3 were duplicates; therefore, only the first specimen from each was included for a final tally of 21 specimens. Specimens were from pleural fluid (n = 16, 76%), pericardial fluid (n = 2), pelvic fluid (n = 2), and peritoneal fluid (n = 1). Nineteen were SqCC (primary sites: 7 lung, 2 uterine cervix, 2 larynx, 2 anus, 2 esophagus, 1 tongue, 1 mandible, 1 skin, 1 vulva), and 2 patients had benign squamous cells only (1 from a ruptured esophageal adenocarcinoma and 1 from a nonmalignant esophageal rupture). In SqCC cases, a round-oval cell with dense cytoplasm was the predominant cell type (n = 12) followed by undifferentiated cells (n = 4), polygonal-type cells (n = 2), and fiber-type cells (n = 1). Of the SqCC specimens, 12 (63%) showed varying degrees of keratinization. Other features in SqCC cases included refractile rings (89%), keratin pearls (53%), and vacuolated cytoplasm (42%). Herxheimer spirals were absent. Two benign cases showed polygonal cell morphology only. All patients with SqCC died shortly after fluid collection (range 2-313 days; mean: 58.1 days).
CONCLUSIONS: Metastatic SqCC in serous effusions are rare, primarily arranged as single cells with rounded nuclei lacking visible nucleoli surrounded by a minimal amount of dense cytoplasm, and represent a dismal prognosis.
Copyright © 2014 American Society of Cytopathology. Published by Elsevier Inc. All rights reserved.
Keywords: Pelvic fluid; Pericardial fluid; Peritoneal fluid; Pleural fluid; Serous effusion; Squamous cell carcinoma
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