摘要:

High‐resolution ultrasonography was evaluated as an alternative to99mTcO‐4scintigraphy for examining size and appearance of thyroid glands in hyperthyroid cats. Thyroid ultrasound examinations were performed on 6 normal cats and 14 cats with hyperthyroidism. Thyroid lobe volume was estimated from ultrasound images using the equation for a prolate ellipsoid, π/6 (length * height * width). Total thyroid volume was estimated by adding the volume estimations of the left and right lobes. Thyroid lobes of hyperthyroid cats were considered abnormal if estimated volume exceeded the 99% confidence interval for normal thyroid volume determined from the control group. Scintigraphic examinations performed on hyperthyroid cats were evaluated for unilateral versus bilateral disease and for the presence of ectopic activity. Mean thyroid lobe volume and total thyroid volume for normal cats was 85 and 169 mm3, respectively. Mean thyroid lobe volume and total thyroid volume for hyperthyroid cats was 578 and 889 mm3. There was a significant difference in mean estimated total thyroid volume of normal and hyperthyroid cats. Thyroid lobes with greater than normal TcO‐4uptake on scintigraphy were larger and had variable homogeneity, echogenicity, and margination on ultrasound examination. There also was an 85.7% agreement of scintigraphy and ultrasonography in differentiating normal from abnormal thyroid lobes. A fair correlation between estimated total thyroid volume of hyperthyroid cats and most recent pretherapy serum thyroxine values were also found. This preliminary study indicates that thyroid ultrasound examination may provide information that is useful for diagnosis and treatment of feline hyperthyroidism. Although ultrasound provides accurate evaluation of the thyroid glands, it cannot replace99mTcO‐4scintigraphy for screening of metastatic lesions and ectopi

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb00178.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

We performed a retrospective study of 100 dogs and 16 cats with planar brain scintigraphy and histopathologically established diagnoses from a total of 485 studies performed from 1976 to 1992. Necropsy (112) or surgical biopsies (4) diagnoses were categorized in two ways: first as focal brain disease, diffuse brain disease or normal; second as either neoplastic, non‐neoplastic or normal. A radiologist reviewed brain scintigrams and categorized the studies as focal areas of increased accumulation, diffuse or poorly localized areas of increased accumulation, or normal. We calculated for this population of 116 animals that focal brain scintigrams had 75% sensitivity and 90% specificity for any focal brain disease. The sensitivity and specificity of a focal scintigraphic lesion for a brain tumor was 72% and 82% respectively. The sensitivity and specificity of a diffuse or poorly localized scintigraphic lesion as a test for diffuse brain disease was 40% and 88% respectivel

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb00179.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb00180.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb00181.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb00182.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb00184.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb00185.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb00186.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb00187.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb00188.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY