title: Fine-needle aspiration (FNA) and pleural fluid cytology diagnosis of benign metastasizing pleomorphic adenoma of the parotid gland in the lung: a case report and review of literature.
abstract: Lesions that contain abundant benign myoepithelial cells, including pleomorphic adenomas of salivary gland origin, may present a diagnostic challenge in fine-needle aspiration (FNA) specimens. Benign metastasizing pleomorphic adenoma is a rare neoplasm, in which the benign appearing pleomorphic adenoma, without any histological evidence of malignancy, metastasizes to distant sites including lung. In the absence of clinical history of a pre-existing myoepithelial neoplasm, the presence of myoepithelial cells in the lung or any other organs besides salivary glands may create diagnostic difficulty. Here we present the cytologic findings of such a metastatic tumor found in the lung FNA and pleural fluid specimens from a 64-year-old woman, with a history of local recurrent salivary gland pleomorphic adenomas, who presented with multiple bilateral pulmonary nodules and pleural effusion. The diagnosis of benign metastasizing pleomorphic adenoma was made based on clinical information and cytomorphology, and confirmed by immunocytochemistry.
authors: Department of Pathology, University of Miami Miller School of Medicine, Jackson Memorial Hospital, Miami, Florida 33136, USA.
authors: Yaxia
authors: Y
authors: Zhang
authors: Carmen R
authors: CR
authors: Gomez-Fernandez
authors: Merce
authors: M
authors: Jorda
authors: Parvin
authors: P
authors: Ganjei-Azar
mesh_terms: D008949:Adenoma, Pleomorphic / Q000473:pathology*; D044963:Biopsy, Fine-Needle; D003584:Cytological Techniques; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008175:Lung Neoplasms / Q000556:secondary*; D008875:Middle Aged; D010307:Parotid Neoplasms / Q000473:pathology*; D016066:Pleural Effusion, Malignant / Q000473:pathology*