Abstract
Medial iliac lymph nodes drain many districts and are easy to identify during an ultrasound examination of the abdomen. Since there are no reference values for their size in healthy dogs, the aim of this work was to evaluate the size of the medial iliac lymph nodes by using a ratio with the aortic diameter and find a reference range. The population was divided into group A (healthy dogs) and group B, with diseases of the medial iliac lymph nodes. The ratio of length, height and thickness of the medial iliac lymph nodes with the diameter of the aorta were calculated and underwent statistical analysis, p < 0.05 was considered statistically significant. Sixty-three patients were enrolled in group A, and 37 in group B. Significant differences were found between the ratio of sick and healthy patients and neoplastic and healthy patients. No significant difference was found between healthy and inflammatory patients. The best cut-off value to discriminate sick and healthy patients was 0.57, with a sensitivity of 78% and a specificity of 71%. The cut-off value of neoplastic and healthy patients was 0.69, with a sensitivity of 89.47% and a specificity of 84.13%. This value is highly predictive of neoplasia.
Highlights
The medial iliac lymph nodes belong to the iliosacral lymph center and are the largest lymph nodes in this group [1]
GROUP A: dogs with no clinical findings related to systemic diseases or to the anatomical structures drained by the medial iliac lymph nodes
One hundred patients were enrolled in this study, 63 in the control group, and 37 in the group with systemic diseases or disorders of the anatomical regions related to the medial iliac lymph nodes
Summary
The medial iliac lymph nodes belong to the iliosacral lymph center and are the largest lymph nodes in this group [1]. They are located laterally to the aorta near its trifurcation, between the deep circumflex iliac and the external iliac arteries [1,2]. They are usually single but can be double on the left, right, or on both sides [1]. If greatly increased in size, the descending colon and rectum are displaced ventrally and sublumbar lymphadenomegaly can be radiographically diagnosed [10]
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