Recurrent and non-recurrent feline injection-site sarcoma: computed tomographic and ultrasonographic findings

Zardo, Karen Maciel; Damiani, Lucas Petri; Matera, Júlia Maria; Pinto, Ana Carolina Brandão de Campos Fonseca

doi:10.1177/1098612x15596200

Cited by 9 publications

(21 citation statements)

References 21 publications

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“…However, our findings suggest that soft tissue mineralization can also be seen in small FISS when using precontrast images of CTA. The present finding that mineralization was seen within the soft tissues of the masses with no adjacent bony lysis is similar to findings in other studies . In this and prior studies, no bone lysis was seen in cats with large masses having a large region of contact with adjacent bone.…”

Section: Discussionsupporting

confidence: 91%

“…Many FISS in this study exhibited heterogeneous contrast medium enhancement that is similar to the previously described ring or peripheral enhancement of FISS on both CTA and MRI . In the present study, when FISS were imaged with MRI, there was a size threshold for heterogeneity.…”

Section: Discussionsupporting

confidence: 86%

“…Using both CTA and MRI, all FISS over 6 cm 3 had larger areas of central hypoattenuation that could be due to necrosis with or without cavitation formation. In previous reports, the hypoattenuating regions represented areas of necrosis in the larger masses . In the current study, larger areas of hypoattenuation were one of the major causes of postcontrast FISS heterogeneity.…”

Section: Discussionsupporting

confidence: 61%

“…Several other veterinary method comparison studies have either found no difference between CTA and MRI, or that either CTA or MRI measurements were larger . Patient positioning can affect measurements of masses . However, patient positioning is unlikely to be the cause of variable mass volume measurements between MRI and CTA since all cats were positioned similarly for both modalities.…”

Section: Discussionmentioning

confidence: 94%

“…[22][23][24] Patient positioning can affect measurements of masses. 2,25 However, patient positioning is unlikely to be the cause of variable mass volume measurements between MRI and CTA since all cats were positioned similarly for both modalities. There was a difference in image slice thickness, 2 or 3 mm for CTA and 3 mm for MRI, and it is possible that more partial volume averaging resulted in larger measurements using MRI.…”

Section: Image Acquisitionmentioning

confidence: 99%

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CT angiography and MRI imaging features do not predict the tumor type and grade of feline injection site sarcoma

Fleming

Nemanic²,

Löhr

et al. 2019

Vet Radiology Ultrasound

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Computed tomographic angiography (CTA) and magnetic resonance imaging (MRI) have been described as methods for preoperative surgical planning in cats with feline injection site sarcomas (FISS), however, few published studies have compared these modalities. The objective of this retrospective, secondary analysis study was to determine if imaging features of FISS on CTA and MRI are predictive of neoplastic peritumoral projections. Archived data from a previous prospective study were retrieved for 10 cats with FISS. All cats had been evaluated in a single anesthetic episode with MRI and dual phase CT (CTA) imaging followed by surgical removal. Histopathological grading and targeted histopathology of imaging‐identified peritumoral projections were performed. Two observers evaluated the CTA and MRI studies for FISS shape, margination, size, enhancement pattern, postcontrast uniformity, pre‐ and postcontrast margination, the number of muscles involved, mass mineralization, and bone lysis. Metal was present in the imaging field of three of 10 cats, resulting in one nondiagnostic MRI. Peritumoral projections were detected in all cats with both imaging modalities, and most were benign. At least one neoplastic peritumoral projection was detected in six cats using MRI, five cats using CTA, and three cats with both modalities. Higher grade FISS were larger than low grade using MRI, and FISS were larger using MRI. Other FISS imaging features using MRI and CTA were similar. Findings supported use of either MRI or CTA for detecting neoplastic peritumoral projections in cats with FISS. Authors recommend CTA for cats with known metallic objects in the scan field.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 86%

Section: Discussionsupporting

confidence: 61%

Section: Discussionmentioning

confidence: 94%