Psoas sign
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Elicited by the iliopsoas test, the psoas sign is an indicator of irritation to the iliopsoas group of hip flexors in the abdomen.
The test is performed by passively extending the thigh of a patient with knees extended. In other words, the patient is positioned on his/her left side, and the right leg is extended behind the patient. If abdominal pain results, it is a positive psoas sign.
Because the right iliopsoas muscle lies under the appendix when the patient is supine, a "positive psoas sign" may suggest appendicitis.
It could also be done by flexing the hip to 90 degrees -- with flexed knee -- asking the patient to actively flex their thigh against resistance.
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Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
