Skin Rash (IMAGE) Cold Spring Harbor Laboratory Caption This image shows a patient with an eczema-like skin rash behind the knees as a result of primary immunodeficiency. Credit The National Institutes of Health Usage Restrictions Image may be used with appropriate credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.