skin disorders
Diagnosis of Skin Disorders
Diascopy
Diascopy is done so that a doctor can observe color changes that occur when pressure is applied to the skin. During this test, a doctor presses a microscope slide against a lesion to see whether it blanches (becomes less red) or otherwise changes color. Certain kinds of lesions become less red, whereas others do not. Some skin lesions (such as those caused by Sarcoidosis ) turn a yellowish brown color when this test is done. 