Computed Tomography Imaging of Neck Soft Tissue Tumors in Dogs
World Small Animal Veterinary Association World Congress Proceedings, 2014
C.A. Batista Lorigados; J.M. Matera; A. Murata Hayashi; C. Matsunaga Martin; A. Sendyk-Grunkraut; K. Maciel Zardo; A.C.B.C. Fonseca Pinto
Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil

Introduction

The neck is a region with various anatomical structures that can be involved by neoplasms. Surgical planning and excision of these tumors are challenging.

Objectives

The aim of this study was to evaluate the contribution of computed tomography (CT) in surgical planning and local staging of soft tissue tumors in the neck.

Methods

Nine dogs were evaluated. CT scans were performed on helical CT pre and post intravenous iodinated contrast. Cytology and/or histologic evaluation of the lesions were performed.

Results

Breed, sex and age of animals, CT characteristics and histological type of tumors are listed (Table 1). Four tumors occur in the glandular tissue (44.44%), three in thyroid and one in salivary gland. Two formations originated from fat tissue (22.22%), and 33.33% include multiple tumor types. CT showed a 22.22% regional lymphadenopathy and 88.89% of the cases the absence of cleavage with adjacent structures. The lipomas were histologically classified as infiltrative; however, CT did not show tumor invasion. One dog presented bone lysis in the fifth cervical vertebra (dog 7). Based on CT findings, six animals underwent surgery.

Dog

Breed, sex, age

CT

Cytology/histopathology

Surgery

Attenuation

Post contrast enhancement

Limits

Lymphadenopathy

1

Mixed-breed, F, 13 y

Soft tissue heterogeneous

Yes

Moderately well defined

No

Plasmacytoma

Yes

2

Teckel, F, 7 y

Fat homogeneous

No

Well defined

No

Infiltrative lipoma

Yes

3

Labrador retriever, F, 13 y

Fat heterogeneous

No

Well defined

No

Infiltrative lipoma

Yes

4

Siberian Husky, F, 11 y

Mixed (soft tissue + calcification)

Yes

Moderately well defined

No

Chondrosarcoma

Yes

5

Poodle, F, 5 y

Soft tissue heterogeneous

Yes

Not defined

Yes

Thyroid carcinoma

No

6

Poodle, M, 10 y

Soft tissue heterogeneous

Yes

Not defined

Yes

Undifferentiated carcinoma

No

7

Mixed-breed, F, 10 y

Soft tissue heterogeneous

Yes

Not defined

No

Hemangiopericytoma

No

8

Lhasa apso, F, 10 y

Soft tissue heterogeneous

Yes

Well defined

No

Bilateral thyroid carcinoma

Yes

9

Mixed-breed, F, 12 y

Soft tissue heterogeneous

Yes

Moderately well defined

No

Salivary gland carcinoma

Yes

Conclusions

Ultrasonography is a widely used method in the evaluation of soft tissue of the neck; however, the CT assessing the involvement of adjacent structures provided additional information for the surgical planning.

  

Speaker Information
(click the speaker's name to view other papers and abstracts submitted by this speaker)

C.A. Batista Lorigados
Department of Surgery
School of Veterinary Medicine and Animal Science
University of São Paulo
São Paulo, Brazil


MAIN : Diagnostic Imaging : CT of Neck Soft Tissue Tumors
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