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Comparison of abdominal ultrasound and magnetic resonance imaging for detection of abdominal lymphadenopathy in dogs with metastatic apocrine gland adenocarcinoma of the anal sac
Author(s) -
Anderson C. L.,
MacKay C. S.,
Roberts G. D.,
Fidel J.
Publication year - 2015
Publication title -
veterinary and comparative oncology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.864
H-Index - 34
eISSN - 1476-5829
pISSN - 1476-5810
DOI - 10.1111/vco.12022
Subject(s) - medicine , magnetic resonance imaging , radiology , adenocarcinoma , inguinal lymphadenopathy , ultrasound , apocrine , pathology , cancer , biopsy
Imaging studies in humans with anal and rectal cancer indicate that magnetic resonance imaging ( MRI ) is a more sensitive technique than abdominal ultrasound ( AUS ) for the detection of abdominal lymphadenopathy. The purpose of this retrospective study was to directly compare the efficacy of these two techniques in detecting abdominal lymphadenopathy in dogs with apocrine gland adenocarcinoma of the anal sac ( AGAAS ). Six dogs with histologically confirmed AGAAS and histopathologic confirmation of metastasis to abdominal lymph nodes ( LN s) had AUS and abdominal MRI . AUS identified lymphadenopathy in two of six dogs, whereas MRI identified lymphadenopathy in all the six dogs. Lymphadenopathy was predominantly sacral in location, with involvement of the medial iliac and hypogastric LN s in only two cases. These data suggest that MRI is more sensitive than AUS for detecting sacral abdominal lymphadenopathy in dogs with AGAAS . As such, MRI could be considered in any patient with AGAAS for initial staging of this disease.