Journal of Veterinary Clinics (한국임상수의학회지)

The Korean Society of Veterinary Clinics (한국임상수의학회)
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Ultrasonographic and Computed Tomographic Features of Dermoid Cyst of the Neck in a Dog: A Case Report

  • Seong-Ju Oh (Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Gyeongsang National University) ;
  • Gunha Hwang (Institute of Animal Medicine, Department of Veterinary Medical Imaging, College of Veterinary Medicine, Gyeongsang National University) ;
  • Eun-Chae Yun (Department of Veterinary Surgery, College of Veterinary Medicine, Gyeongsang National University) ;
  • Dongbin Lee (Department of Veterinary Surgery, College of Veterinary Medicine, Gyeongsang National University) ;
  • Sung-Lim Lee (Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Gyeongsang National University) ;
  • Hee Chun Lee (Institute of Animal Medicine, Department of Veterinary Medical Imaging, College of Veterinary Medicine, Gyeongsang National University) ;
  • Tae Sung Hwang (Institute of Animal Medicine, Department of Veterinary Medical Imaging, College of Veterinary Medicine, Gyeongsang National University)
  • Received : 2024.07.09
  • Accepted : 2024.08.06
  • Published : 2024.08.31
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Abstract

A 13-year-old castrated male mixed-breed dog presented for a health screening with a small nodule on the left hindlimb, which was revealed to be a mast cell tumor. A CT scan was performed to evaluate the mast cell tumor, and it incidentally revealed a well-marginated, fluid-attenuating, non-contrast enhanced mass in the deep ventral region of the left lower neck. Ultrasonography confirmed a well-capsulated mass with a cranio-ventrally protruding lesion extending into sternohyoid muscles. The outer layer of the mass had a hypoechoic thick wall and the internal parenchyma contained hyperechoic foci and multiple hyperechoic parallel lines. The mass was surgically resected. Histopathological examination confirmed a dermoid cyst characterized by cornifying squamous epithelial cells, keratinaceous debris, and hair shaft fragments. The dog showed no signs of recurrence or additional abnormalities three months post-surgery. This report highlights the importance of considering dermoid cysts in the differential diagnosis of neck masses on imaging examinations using CT or ultrasonography.

Keywords

Acknowledgement

This work was supported by the Institute of Animal Medicine of Gyeongsang National University.

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