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DAILY FREE MCQ CHALLENGE for Medical PG Preparation
Diascopy is done for which of the following?
A. Change in color of lesion on wood’s light exposure
B. Change in color of lesion on pressure with glass slide
C. Scraping of lesion for KOH mount
D. Aspiration of lesions for inflammatory exudates
TIPSImportant Question from MCI 2012
Answer : B. Change in color of lesion on pressure with glass slide
Diascopy is a test for blanchability performed by applying pressure with a finger or glass slide and observing color changes.
It is used to determine whether a lesion is vascular (inflammatory) or non vascular (nevus) or hemorrhagic (petechiae or purpura). Hemorrhagic lesions and nonvascular lesions do not blanch; inflammatory lesions do.
Reference : e-Study Guide for: Advanced Health Assessment & Clinical Diagnosis in primary care/4e By Cram101 Textbook Reviews; Approach to the Patient with a Skin Disorder. In: Kasper D, Fauci A, Hauser S, Longo D, Jameson J, Loscalzo J. eds. Harrison’s Principles of Internal Medicine, 19e. Reference link
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