Inflammatory pseudotumor of the parotid gland: report of a case with fine needle aspiration cytology.
BACKGROUND
Inflammatory pseudotumor is a rare lesion of the parotid gland. It usually presents as a mass lesion; thus, the clinical and radiologicfeatures often suggest malignancy. To the best of our knowledge, fine needle aspiration cytologic findings in parotid inflammatory pseudotumor have not been reported previously.


METHODS
A 59-year-old male presented with a palpable right parotid mass. Computed tomography revealed a mass measuring 2.5 cm in diameter. Fine needle aspiration cytology showed inflammatory cells, foamy histiocytes and groups of spindle-shaped cells without cytologic atypia. A diagnosis of inflammatory pseudotumor was suggested and was confirmed on histology.


CONCLUSIONS
In the presence of a clinically evident mass in the parotid gland and fine needle aspiration cytologic features of inflammatory cells with sheets of spindle cells, the diagnosis of inflammatory pseudotumor should be suspected. The differential diagnosis of this unusual parotid gland lesion principally includes sialadenitis and myoepithelioma.
Histopathology Service, Ospedale San Carlo-Istituto Dermopatico dell'Immacolata Sanità, Rome, Italy. s.rahimi@idi.it
Siavash
S
Rahimi
Barbara
B
Mafera
Maurizio G
MG
Vigili
D015415:Biomarkers / Q000032:analysis; D044963:Biopsy, Fine-Needle; D003937:Diagnosis, Differential; D006104:Granuloma, Plasma Cell / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D009208:Myoepithelioma / Q000175:diagnosis; D010305:Parotid Diseases / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D010306:Parotid Gland / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D010503:Periodic Acid-Schiff Reaction; D018987:Salivary Ducts / Q000473:pathology; D012793:Sialadenitis / Q000175:diagnosis; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
D015415:Biomarkers