title: Multifocal nodular oncocytic hyperplasia in parotid gland: a case report.
abstract: BACKGROUND
  Multifocal nodular oncocytic hyperplasia (MNOH) is a rare lesion of the parotid gland. Fine needle aspiration cytology (FNAC) in MNOH has not been described previously to the best of our knowledge.
  
  
  METHODS
  A 55-year-old woman presented with a lump at the left angle of her mouth for 2 months. Local examination revealed a hard, nontender parotid mass. FNAC revealed clusters as well as discretely lying oncocytic cells. cells at places showed moderate nuclear pleomorphism. The features were consistent with a diagnosis of oncocytic neoplasm neoplasm; however, because of pleomorphism, a suspicion of carcinoma was offered. The patient underwent superficial parotidectomy, and histopathology examination revealed it to be multifocal nodular oncocytic hyperplasia.
  
  
  CONCLUSIONS
  MNOH is a rare nonneoplastic salivary gland lesion and should be considered in the differential diagnosis of oncocytic neoplasm on FNAC.
authors: Department of Histopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
authors: Richa
authors: R
authors: Goyal
authors: Arvind
authors: A
authors: Ahuja
authors: Nalini
authors: N
authors: Gupta
authors: Gurpreet
authors: G
authors: Singh
authors: Kim
authors: K
authors: Vaiphei
mesh_terms: D044963:Biopsy, Fine-Needle; D004847:Epithelial Cells / Q000473:pathology; D005260:Female; D006801:Humans; D006965:Hyperplasia; D008875:Middle Aged; D008928:Mitochondria / Q000648:ultrastructure; D024862:Oxyphil Cells / Q000473:pathology* / Q000648:ultrastructure; D010306:Parotid Gland / Q000473:pathology* / Q000648:ultrastructure