Surgical Margins in Canine Cutaneous Soft-Tissue Sarcomas: A Dichotomous Classification System Does Not Accurately Predict the Risk of Local Recurrence

Adjuvant treatments are recommended in dogs with incompletely excised cutaneous soft-tissue sarcoma (STS) to reduce the risk of local recurrence (LR), although guidelines are lacking on how to manage clean but close margins (CbCM). This retrospective study investigates the impact of CbCM on LR of ca...

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Bibliographic Details
Published in:Animals (Basel) 2021-08, Vol.11 (8), p.2367
Main Authors: Chiti, Lavinia Elena, Ferrari, Roberta, Roccabianca, Paola, Boracchi, Patrizia, Godizzi, Francesco, Busca, Giuseppe Achille, Stefanello, Damiano
Format: Article
Language:English
Subjects:
Abdomen
Chemotherapy
Classification
dog
Dogs
Guidelines
Histopathology
margins
Medical prognosis
Metastasis
recurrence
Risk
Sarcoma
Soft tissue sarcoma
Soft tissues
Statistical methods
Surgery
Tissues
Tumors
Variables
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Summary:Adjuvant treatments are recommended in dogs with incompletely excised cutaneous soft-tissue sarcoma (STS) to reduce the risk of local recurrence (LR), although guidelines are lacking on how to manage clean but close margins (CbCM). This retrospective study investigates the impact of CbCM on LR of canine STS. Ninety-eight surgically excised canine STS at first presentation were included. Tissue samples were routinely trimmed and analyzed. Cumulative incidence of LR was estimated for each category of margins (tumor-free, infiltrated, CbCM), and included CbCM in the tumor-free and infiltrated category, respectively. The prognostic impact on LR was then adjusted for relevant prognostic factors. Cumulative incidence of LR at three years differed significantly between the three categories (p = 0.016), and was estimated to be 42% with infiltrated margins, 23% with CbCM, 7% with tumor-free margins. Both when CbCM were grouped with infiltrated margins (p = 0.033; HR = 5.05), and when CbCM were grouped with tumor-free margins (p = 0.011; HR = 3.13), a significant difference between groups was found. STS excised with infiltrated margins had the greatest risk of LR. The rate of LR with CbCm was greater than recurrence rate of tumor-free margins. The category CbCM may be considered as a separate prognostic category.
ISSN:2076-2615
2076-2615
DOI:10.3390/ani11082367