Polymorphous low-grade adenocarcinoma: an analysis of epidemiological studies and hints for pathologists.

Abstract:

BACKGROUND:This study is an analysis of the prevalence of polymorphous low grade adenocarcinoma (PLGA) in epidemiological surveys of salivary tumors published in the English language from 1992 to 2012. METHODS:These surveys included studies from different researchers, countries and continents. The 57 surveys for which it was possible to calculate the percentage of PLGAs among all malignant minor salivary gland tumors (MMSGT) were included in this review. RESULTS:The statistical analyses show significant differences in the PLGA percentage by time period, country and continent in the studies included in this review. The percentage of PLGAs among MMSGTs varied among the studies, ranging from 0.0% to 46.8%. PLGA rates have varied over the period studied and have most recently increased. The frequency of reported PLGA cases also varied from 0.0% to 24.8% by the country in which the MMSGT studies were performed. The PLGA percentages also varied significantly by continent, with frequencies ranging from 3.9% in Asia to 20.0% in Oceania CONCLUSION:Based on these results, we concluded that although the accuracy of PLGA diagnoses has improved, they remain a challenge for pathologists. To facilitate PLGA diagnoses, we have therefore made some suggestions for pathologists regarding tumors composed of single-layer strands of cells that form all of the histological patterns present in the tumor, consistency of the cytological appearance and uniformly positive CK7, vimentin and S100 immunohistochemistry, which indicate a single PLGA phenotype. VIRTUAL SLIDE:The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/1059098656858324.

journal_name

Diagn Pathol

journal_title

Diagnostic pathology

authors

de Araujo VC,Passador-Santos F,Turssi C,Soares AB,de Araujo NS

doi

10.1186/1746-1596-8-6

subject

Has Abstract

pub_date

2013-01-15 00:00:00

pages

6

issn

1746-1596

pii

1746-1596-8-6

journal_volume

8

pub_type

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