Peer-reviewed veterinary case report
Tumor grades linked to spread in dog bone cancer cases
By Loukopoulos, P & Robinson, W F·Published in Journal of comparative pathology·2007·School of Veterinary Science, Australia·View original on PubMed →
PetCaseFinder translated the abstract of this peer-reviewed paper into plain English so pet owners can read it. We do not publish original research — every detail traces back to the citation above. How we work →
Original publication title: Clinicopathological relevance of tumour grading in canine osteosarcoma.
- Species:
- dog
Plain-English summary
A study looked at 140 cases of osteosarcoma, a type of bone cancer, in dogs to understand how tumor grading affects prognosis. They found that younger dogs, especially those under 4 years old, tended to have more aggressive (higher grade) tumors. Tumors that had spread to other parts of the body were also more likely to be high-grade. The researchers noted that certain types of osteosarcoma were associated with higher grades, and the location of the tumor affected its characteristics. Understanding these factors can help veterinarians predict outcomes and tailor treatment plans for affected dogs.
People also search for: dog osteosarcoma prognosis · canine bone cancer treatment · high-grade osteosarcoma in young dogs
Abstract
Tumour grading assesses biological aggressiveness and is of prognostic significance in many malignancies. The clinicopathological features of 140 primary canine osteosarcomas and their metastases were analysed, and the interrelations between them and an established grading system and its constituent parameters (mitotic index, necrosis, pleomorphism) were examined. Of these tumours, 35% were grade III (high-grade), 37% grade II and 28% grade I. Primary tumours that had metastasized were of significantly higher grade than non-metastatic osteosarcomas. Osteosarcomas belonging to the osteoblastic minimally productive subtype, but not chondroblastic or telangiectatic subtypes, differed from fibroblastic osteosarcomas in being associated with a significantly higher number of high-grade cases. Dogs younger than 4 years of age had osteosarcomas with higher grade, score and mitotic index than did older animals. Appendicular differed from axial tumours in having a higher mitotic index; distal differed from proximal tumours in being of higher grade; cranial tumours differed from tumours in most other sites in being of lower grade and lower mitotic index. Rib osteosarcomas showed a particularly high degree of necrosis. The mitotic index varied widely between tumour locations. Pleomorphism did not have prognostic merit when examined separately, as most osteosarcomas were highly pleomorphic.
Find similar cases for your pet
PetCaseFinder finds other peer-reviewed reports of pets with the same symptoms, plus a plain-English summary of what was tried across them.
Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/17270206/