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Computed tomographic assessment of sternal lymph node dimensions and attenuation in healthy dogs

  • Autores: Milan Milovancev, Sarah Nemanic, Gerd Bobe
  • Localización: American Journal of Veterinary Research, ISSN-e 1943-5681, ISSN 0002-9645, Vol. 78, Nº. 3, 2017, págs. 289-294
  • Idioma: inglés
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  • Resumen
    • OBJECTIVE To assess dimensions and attenuation of sternal lymph nodes (SLNs) observed by means of CT in healthy dogs.

      ANIMALS 12 healthy adult research dogs.

      PROCEDURES Precontrast and postcontrast enhanced CT of the thorax was performed on each dog. Objective and subjective contrast-enhanced CT measurements were obtained.

      RESULTS By use of CT, 2 SLNs were identified in 10 of the 12 dogs and 1 SLN was identified in 2. Median SLN length, height, and width were 8.5 mm (range, 4 to 22 mm), 6.0 mm (range, 3 to 10 mm), and 5.0 mm (range, 3 to 10 mm), respectively. Median SLN length-to-T4 ratio, height-to-T4 ratio, and width-to-T4 ratio were 0.64 (range, 0.24 to 1.22), 0.37 (range, 0.25 to 0.53), and 0.29 (range, 0.19 to 0.67), respectively. Median SLN volume was 123 mm3 (range, 38 to 484 mm3). Median height-to-length ratio, width-to-length ratio, and height-to-width ratio were 0.57 (range, 0.27 to 1.75), 0.51 (range, 0.31 to 1.25), and 1.27 (range, 0.50 to 2.50), respectively. All SLNs had homogenous contrast enhancement with median precontrast and postcontrast attenuation values of 18.3 Hounsfield units (HU; range, 4.4 to 36.9 HU) and 41.3 HU (range, 24.0 to 77.4 HU), respectively. All SLNs had a visible hilus, which was fat attenuating in 8 dogs and hypoattenuating in 4 dogs.

      CONCLUSIONS AND CLINICAL RELEVANCE CT imaging characteristics described in this study may provide a reference for dimensions and appearance of SLNs of healthy dogs and serve as a basis for comparison with results for diseased dogs.


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