A large malignant oncocytoma of parotid gland: a case report

Authors

  • Nidhi Mohan Sreedevi Department of ENT, Karnataka Institute of Medical Sciences, Hubballi, Karnataka, India http://orcid.org/0000-0002-1992-9413
  • Sunita S. Vernekar Department of Pathology, Karnataka institute of Medical Sciences, Hubballi, Karnataka, India
  • Mohammed M. Abdus Samee Department of Pathology, Karnataka institute of Medical Sciences, Hubballi, Karnataka, India
  • Manjunath Dandinarasaiah Department of ENT, Karnataka Institute of Medical Sciences, Hubballi, Karnataka, India

DOI:

https://doi.org/10.18203/issn.2454-5929.ijohns20205079

Keywords:

Malignant oncocytoma, Salivary gland, Tumor

Abstract

Malignant oncocytoma is an extremely rare neoplasm of the salivary gland accounting for 0.5% of epithelial salivary gland malignancies and 0.18% of epithelial salivary gland tumors. We report a case of malignant oncocytoma of left parotid gland in a 61-year old female patient. Patient presented with a 6-year history of painless swelling in the left parotid region. Fine needle aspiration cytology of the swelling was suggestive of pleomorphic adenoma. A computed tomography scan performed did not reveal any features suggestive of malignancy. Patient underwent left superficial parotidectomy. However, histopathological examination of the specimen turned out to be malignant oncocytoma. Malignant oncocytoma of salivary glands have rare incidence and may have similar morphologic features with other neoplasms. Despite the tumor being large and malignant in this case, there was no facial palsy preoperatively. As histopathology is often diagnostic, the possibility of malignancy always must be kept in mind preoperatively even when there is no facial palsy or fine needle aspiration cytology not showing up malignancy.

Author Biographies

Nidhi Mohan Sreedevi, Department of ENT, Karnataka Institute of Medical Sciences, Hubballi, Karnataka, India

Department of ENT

Postgraduate 

Sunita S. Vernekar, Department of Pathology, Karnataka institute of Medical Sciences, Hubballi, Karnataka, India

 Department of Pathology

Professor

Mohammed M. Abdus Samee, Department of Pathology, Karnataka institute of Medical Sciences, Hubballi, Karnataka, India

Department of Pathology

Postgraduate

Manjunath Dandinarasaiah, Department of ENT, Karnataka Institute of Medical Sciences, Hubballi, Karnataka, India

Department of ENT

Associate Professor

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Published

2020-11-24

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Section

Case Reports