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Mandibular infiltrative lipoma in a mixed breed dog
  1. Grace Pei-Chun Lai1,
  2. Laura E Selmic2,
  3. David H Hummel3 and
  4. Stephen K Joslyn2
  1. 1 Small Animal Clinical Science, Michigan State University, East Lansing, Michigan, USA
  2. 2 Veterinary Clinical Medicine, University of Illinois, Urbana, Illinois, USA
  3. 3 Chicago Veterinary Emergency and Specialty Center, Chicago, Illinois, USA
  1. Correspondence to Dr Laura E Selmic; lselmic{at}


Lipoma is a neoplastic process of well-differentiated adipocytes that is clearly demarcated from the adjacent tissues. An infiltrative lipoma has histopathological features similar to a simple lipoma, with well-differentiated adipose cells. The distinctive difference with infiltrative lipoma is the capacity to infiltrate into surrounding tissues such as muscle fibres, vessels, nerves and bones. Considering the cytologically benign characteristics of this tumour, the diagnosis of infiltrative lipoma must be confirmed by histological assessment to identify margin and involvement of surrounding tissue. This case report provides an additional differential diagnosis (infiltrative lipoma) to consider when seeing a canine patient with facial mass. In the case described here, wide resection of the mandibular infiltrative lipoma provided long-term remission without the need of additional treatment.

  • Clinical practice
  • Dogs
  • Imaging
  • Oncology
  • Soft tissue surgery
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  • Contributors All authors substantially contributed to the manuscript.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Data sharing statement No additional data on available.

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