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Pleomorphic adenoma of the parotid gland 1985-2010: A Danish nationwide study of incidence, recurrence rate, and malignant transformation

  • Simon Andreasen
  • , Marianne H Therkildsen
  • , Kristine Bjørndal
  • , Preben Homøe
150 Citationer (Scopus)

Abstract

BACKGROUND: Pleomorphic adenoma is the most frequent salivary gland tumor and is known for its tendency to recur and for its ability to transform to carcinoma ex pleomorphic adenoma (Ca-ex-PA). Along with pleomorphic adenoma demographics, we present the first nationwide study with long-term follow-up on these topics.

METHODS: The Danish Pathology Data Bank was searched for parotid pleomorphic adenoma and Ca-ex-PA in the period 1985 to 2010 and all pathology descriptions were reviewed. Ca-ex-PA specimens were reviewed by a pathologist.

RESULTS: A total of 5.497 patients were identified and 2.86% had at least one recurrence. An incidence of 4.29/100,000/year was found. The rate of malignant transformation in recurrent pleomorphic adenoma was 3.3%.

CONCLUSION: We report an up-to-date assessment of the epidemiology of pleomorphic adenoma. We found an increasing incidence and low recurrence rate compared with previous studies. The risk of Ca-ex-PA for patients with recurrent pleomorphic adenoma was low compared to the literature. © 2015 Wiley Periodicals, Inc. Head Neck 38: E1364-E1369, 2016.

OriginalsprogEngelsk
TidsskriftHead and Neck
Vol/bind38 Suppl 1
Sider (fra-til)E1364-9
ISSN1043-3074
DOI
StatusUdgivet - apr. 2016

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