Can Vet J 2021 Aug;62(8):857-860
Department of Veterinary Biosciences and Diagnostic Imaging (Gendron, Perlini), Department of Pathology (Howerth), Department of Small Animal Medicine and Surgery (Nagata, Northrup), College of Veterinary Medicine, University of Georgia, Athens, Georgia 30602, USA.
Two adult neutered male dogs were presented for evaluation of firm, painless masses arising within muscle: an 8-year-old German wirehaired pointer dog with an accessory tricipital growth, and a 3-year-old German shepherd dog with a gracilis muscle growth. Magnetic resonance imaging (MRI) characteristics suggested malignant behavior, with a central fluid-like portion with a hyperenhancing lining, a nidus of disorganized tissue, and an extensive reactive zone, whereas histopathology was consistent with low-grade fibrosarcoma. This report describes histologically low-grade, yet biologically high-grade intramuscular fibrosarcoma, in which MRI provided detailed information on tumor behavior and assisted with biopsy and surgical planning. Read More