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Title: Fibroblastic Subtype has a Favourable Prognosis in Appendicular Osteosarcoma of Dogs.
Austin Authors: Al-Khan, A A;Nimmo, J S;Day, M J;Tayebi, M;Ryan, S D;Kuntz, C A;Simcock, J O;Tarzi, R;Saad, E S;Richardson, S J;Danks, Janine A
Affiliation: School of Health and Biomedical Sciences, RMIT University, Melbourne, Victoria, Australia
School of Health and Biomedical Sciences, RMIT University, Melbourne, Victoria, Australia
Department of Medicine, Austin Health, The University of Melbourne, Heidelberg, Victoria, Australia
School of Veterinary and Life Sciences, Murdoch University, Murdoch, Western Australia, Australia
Australian Specialised Animal Pathology Laboratory, Mulgrave, Victoria, Australia
School of Medicine, Western Sydney University, Campbelltown, New South Wales, Australia
Translational Research and Animal Clinical Trial Study Group (TRACTS), Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Werribee, Victoria, Australia
Southpaws Veterinary Hospital, Moorabbin, Victoria, Australia
School of Health and Biomedical Sciences, RMIT University, Melbourne, Victoria, Australia
Issue Date: Apr-2020
Date: 2020-04
Publication information: Journal of comparative pathology 2020; 176: 133-144
Abstract: Osteosarcoma (OS) is an aggressive malignant bone neoplasm that occurs mostly in the appendicular skeleton of dogs and people. OS is classified based on the presence of malignant stroma and the formation of extracellular matrix into osteoblastic, chondroblastic and fibroblastic forms. This study investigated the correlation between the three histological subtypes of canine OS and clinical outcome. Additionally, we examined whether there was any difference in the immunolabelling of desmin, S100 and neuron-specific enolase (NSE) between the three histological subtypes. Formalin-fixed and paraffin wax-embedded tissues from 87 dogs with primary OS were available for this study. The survival times were correlated with appendicular OS subtypes in dogs that were treated surgically, received adjuvant chemotherapy and had no pulmonary metastasis at the time of diagnosis. Dogs with an appendicular fibroblastic OS had significantly prolonged mean average survival times (546 ± 105 days) in comparison with dogs having appendicular osteoblastic (257 ± 48 days) or appendicular chondroblastic (170 ± 28 days) OS (P = 0.003, Log Rank). The results also revealed that the appendicular chondroblastic subtype is a significant indicator for poor prognosis in dogs compared with the fibroblastic or osteoblastic subtypes (P = 0.006, Cox regression). Moreover, the findings indicated that there was no significant correlation between the localization of desmin, NSE or S100 and histological subtypes. Importantly, dogs with appendicular fibroblastic OS were found to have a better prognosis when compared with dogs with other subtypes. This may suggest that histological subtypes of appendicular OS have diverse behaviour and could be used to categorize patients for risk-based assessment.
DOI: 10.1016/j.jcpa.2020.02.011
ORCID: 0000-0002-2789-3449
Journal: Journal of comparative pathology
PubMed URL: 32359626
Type: Journal Article
Subjects: dog
histological subtype
survival time
Appears in Collections:Journal articles

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