Daniel J, Barra CN, Pulz LH, Kleeb SR, Xavier JG, Catão-Dias JL, Nishiya AT, Fukumasu H, Strefezzi RF. Intratumoral collagen index predicts mortality and survival in canine cutaneous mast cell tumours.
Vet Dermatol 2019;
30:162-e48. [PMID:
30693578 DOI:
10.1111/vde.12726]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/03/2018] [Indexed: 01/01/2023]
Abstract
BACKGROUND
Mast cell tumours (MCTs) constitute almost 25% of cutaneous neoplasms in dogs. Their biological behaviour is predicted using histopathological grading which is based on several subjective criteria that are vulnerable to intra- and interobserver variability. To improve the prediction of the biological behaviour, several complementary markers have been studied. The integrity of the extracellular matrix (ECM) may play a protective role against tumoral progression, and favour cellular proliferation, angiogenesis, invasion and metastases when altered.
HYPOTHESIS/OBJECTIVES
To evaluate the quantification of collagen and elastic fibres as prognostic markers for MCTs.
ANIMALS
Thirty-eight random cases of canine cutaneous MCT surgically treated with wide margins were included.
METHODS AND MATERIALS
Intratumoral collagen and elastic fibres were identified and quantified on histological sections stained with Masson's trichrome, Picrosirius red and Verhoeff; the results were compared with histopathological grades, mortality due to the disease and postsurgical survival.
RESULTS
Morphometric analysis revealed a significant relationship between histopathological grade and intratumoral collagen index (CoI). In addition, the CoI was considered an independent indicator for mortality and postsurgical survival.
CONCLUSIONS AND CLINICAL IMPORTANCE
These results support the importance of the CoI in the grading and prognosis of MCTs, suggesting that preservation and/or synthesis of collagen have the potential to become targets for MCT therapeutics.
Collapse