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Leriche's syndrome, or aortoiliac occlusive disease, is a rare entity caused by progressive obliteration of the infrarenal abdominal aorta, which gradually extends to the iliac arteries, normally sparing the renal arteries. It is associated with various vascular risk factors. The clinical presentation can be acute or chronic, these patients often present vascular claudication. Diagnosis requires an adequate clinical history and is confirmed by imaging studies. Computed tomography angiography is the best non-invasive imaging technique for this diagnosis, of course, always having a clinical suspicion as a pillar. [ABSTRACT FROM AUTHOR]

Purpose. Show the versatility and diagnostic usefulness of ultrasound in evaluating claudication in pediatric patients in different diseases. Introduction. Claudication at pediatric age has many etiologies depending on the patient's age. It may be conditioned by developmental disorders or alterations in dysplastic hip morphology, inflammatory disease with synovitis, traumatic injury with edema soft tissues or tearing due to muscular contusion or neoformation processes such as hemangiomas and some muscle or bone tumors. Material and method. Ultrasound studies of soft tissues and hips were performed on children from 15 days to 10 years of age, with clinical signs of claudication and/or pain in the hip joint. Ultrasounds were taken with a Siemens Antares™ machine with a 3 to 7.5 MHz multi-frequency linear transducer: longitudinal, transverse, and extended field images. Results. The patients examined were diagnosed with hip dysplasia with 1st, 2nd, and 3rd degree (De Graff) luxation, inflammatory synovitis, Legg- Calvé-Perthes disease, 1st and 2nd degree muscle tears, intermuscular lipoma, postraumatic hematoma, hemangioma and Ewing sarcoma with soft tissue damage. Conclusions. Ultrasound, due to its versatility, dynamism, no need to sedate the patient, and the low cost of studies in children with claudication, can be used as an initial study method (to determine etiology), and for monitoring and evolution of entities such as hip dysplasia or inflammatory processes. [ABSTRACT FROM AUTHOR]