Metachronous bilateral pleomorphic adenoma of the parotid gland.
Bilateral salivary gland tumors are very rare, accounting for 3% of all parotid gland tumors. Although the most common tumor with bilateral development is the Warthin tumor, pleomorphic adenomas (PA) have been diagnosed simultaneously as well, but in a smaller incidence. Because of this, the prevalence, etiology, pathogenesis, and behavior of the PA in this context are poorly understood. We present a case of bilateral metachronous PA affecting the parotid gland in a 63-year-old woman. Clinically, the lesions presented with similar aspects as seen in cases of solitary PA with slow-growing asymptomatic nodule. Both lesions were diagnosed by fine-needle aspiration biopsy at an interval of 2 years between them. A total and superficial parotidectomy for left and right tumors, respectively, was performed. Only on the left side some facial nerve branches were removed that induced partial paralysis in the patient. A review of the pertinent literature is included.
Silva
Sindeval José da
SJ
Department of Head and Neck Surgery, University Hospital, School of Medicine, Federal University of Uberlândia, Uberlândia, MG, Brazil.
Costa Junior
Gabriel Tadeu
GT
Brant Filho
Adalberto Caldeira
AC
Faria
Paulo Rogério
PR
Loyola
Adriano Mota
AM
D008949:Adenoma, Pleomorphic / Q000473:pathology* / Q000601:surgery; D005154:Facial Nerve / Q000601:surgery; D005260:Female; D006801:Humans; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D010306:Parotid Gland / Q000601:surgery; D010307:Parotid Neoplasms / Q000473:pathology* / Q000601:surgery