Reserch Abstract

by No Name Given
(São Paulo, Brazil)

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Original

Title of abstract: COMPUTERISED TOMOGRAPHY CHARACTERIZATION OF FELINE INJECTION-SITE SARCOMAS IN 17 CASES.

Author list:

List of affilliations: School of Veterinary Medicine and Animal Science, University of São Paulo, Brazil.

Introduction/Purpose: The feline injection-site sarcoma (FISS) becomes a new challenge for veterinary oncologists. The high recurrence rates show necessity of betters exam analyzes of neoplasia characteristic and adherence. New imaging techniques i.e. computerised tomography (CT) plays an important role helping oncologists improve the diagnosis of several neoplasias. CT parameters are important to neoplasia prognosis, like attenuation pre and pos contrast, appearance heterogeneous, and enhancement pos contrast. This study aim to characterize the feline injection-site sarcoma (FISS) aspect based in computerised tomography exam.

Material and Methods: 17 cats with FISS underwent a CT exam. They are submitted to anaesthesia and then positioned. Slices of 2 a 5 mm with 5 of increment were performed, pre e pos contrast. Organs and muscles commitment, blurring of adjacent fat, presence of areas of central liquefaction, and enhancement pos contrast (heterogeneous or homogeneous) were analyzed.

Results: 13 patients showed heterogeneous enhancement (76%). Nevertheless, 7 patients (41%) presented muscle invasion, 7 (41%) presented blurring of adjacent fat, and 11 (65%) did not present cleavage between neoplasia and adjacent structures (muscle, bone). Only in 2 patients the soft tissue mass did not invade adjacent structures, and had a cleavage with the adjacent structures. 1 patient presented a punctual calcification into the mass. Of 10 patients that did not show muscle commitment, 7 did not present cleavage between the mass and muscle, and 4 showed blurring of adjacent fat.

Discussion/Conclusion: 15 cats presented some type of involvement of adjacent structures, either by muscles invasion, fat blurring or absence of cleavage and 2 patients showed only local commitment. These findings demonstrate the invasiveness of the FISS, and the relevance of the CT exam to aim a better surgical planning, in order to calculate the most appropriated oncology margins.

Presentation type: oral

Name of presenting Author (please retype):

eMail of presenting author

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Corrected Copy


Title of abstract: COMPUTERIZED TOMOGRAPHY CHARACTERIZATION OF FELINE INJECTION-SITE SARCOMAS IN 17 CASES.

Author list:

List of affiliations: School of Veterinary Medicine and Animal Science, University of São Paulo, Brazil.

Introduction/Purpose: Feline injection-site sarcoma (FISS) is becoming a new challenge for Veterinary Oncologists. High recurrence rates show the necessity of better exam analysis of neoplasia characteristics and adherence. New imaging techniques, i.e. Computerized Tomography (CT) play an important role in helping oncologists improve the diagnoses of several neoplasias.

CT parameters, such as attenuation of pre and pos contrast, heterogeneous appearance and enhancement of pos contrast are important to neoplasia prognosis. This study aims to characterize the feline injection-site sarcoma (FISS) aspect based in the computerized tomography exam.

Material and Methods: Seventeen cats with FISS underwent CT exams. They were submitted to anesthesia and then positioned. Slices of from 2 to 5 mm in 5 increments were performed, pre and pos contrast. Organ and muscle commitment, blurring of adjacent fat, presence of areas of central liquefaction, and enhancement pos contrast (heterogeneous or homogeneous) were analyzed.

Results: 13 patients showed heterogeneous enhancement (76%). Nevertheless, 7 patients (41%) presented muscle invasion, 7 (41%) presented blurring of adjacent fat, and 11 (65%) did not present cleavage between neoplasia and adjacent structures (muscle, bone). Only in 2 patients did the soft tissue mass not invade adjacent structures, and had a cleavage with the adjacent structures. One patient presented a punctual calcification into the mass. Of 10 patients that did not show muscle commitment, 7 did not present cleavage between the mass and muscle, and 4 showed blurring of adjacent fat.

Discussion/Conclusion: Fifteen cats presented some type of involvement of adjacent structures, either by muscle invasion, fat blurring or absence of cleavage and 2 patients showed only local commitment. These findings demonstrate the invasiveness of the FISS, and the relevance of the CT exam in designing a better surgical planning, in order to calculate the most appropriate oncology margins.

Presentation type: oral

Name of presenting Author (please retype):

email of presenting author: