J Pathol Transl Med.  2018 Nov;52(6):411-415. 10.4132/jptm.2018.07.15.

Squamous Metaplasia in Pleomorphic Adenoma: A Diagnostic and Prognostic Enigma

Affiliations
  • 1Department of Oral and Maxillofacial Pathology and Microbiology, I.T.S. Dental College, Hospital and Research Centre, Greater Noida, India. sharmaswatisharma86@gmail.com
  • 2Department of Oral Medicine and Radiology, I.T.S. Dental College, Hospital and Research Centre, Greater Noida, India.

Abstract

Pleomorphic adenoma (PA) is the most common benign salivary gland tumor. Histologically, squamous metaplasia has been reported in PA, but has rarely been documented as being extensive enough to cause significant misdiagnosis. Here, we present an unusual case of PA in a 50-year-old female patient presenting with swelling on the postero-lateral aspect of the palate for a week. Histopathologically, the tumor exhibited the features of conventional PA with extensive squamous metaplasia and giant keratotic lamellae in cyst-like areas. Such exuberant squamous metaplasia and keratin can be a diagnostic and prognostic pitfall and lead to overtreatment of the patient.

Keyword

Squamous metaplasia; Pleomorphic adenoma; Pathology
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