Peer-reviewed veterinary case report
Malignant bone tumor from spinal osteochondroma in two adult dogs
By Green, E M et al.·Published in Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association·1999·Department of Surgical Sciences, United States·View original on PubMed →
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Original publication title: Malignant transformation of solitary spinal osteochondroma in two mature dogs.
- Species:
- dog
Plain-English summary
A 7-year-old Labrador and a 9-year-old Golden Retriever were both diagnosed with solitary spinal osteochondromas, which are bony tumors that can appear benign on X-rays. However, both dogs showed signs of pain and discomfort, leading to further investigation. Unfortunately, these tumors transformed into a more aggressive cancer called osteosarcoma. This case highlights the importance of monitoring any bony growths in dogs, even if they seem harmless at first, as they can become serious.
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Abstract
Canine osteochondroma is an uncommon bony tumor that arises in skeletally immature animals. Consequently, clinical signs typically occur in young dogs as a result of impingement of normal structures by the tumor. Radiographically, osteochondromas are benign in appearance. They are well circumscribed and cause no bony lysis nor periosteal proliferation. Osteochondromas may occur in two forms; solitary or multiple. Although histology and biologic behavior are identical, when in the multiple form the condition has been termed multiple cartilaginous exostoses. Malignant transformation of multiple cartilaginous exostoses has been reported in three mature dogs. We report two dogs with malignant transformation of solitary spinal osteochondromas. Both underwent transformation to osteosarcoma. Despite the benign radiographic appearance of osteochondromas and multiple cartilaginous exostoses, clinical signs should alert the clinician to the possibility of malignant transformation.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/10608692/