Stretch and pinch tests to assess the suitable management for acne rolling scars

Published: 17 May 2022| Version 1 | DOI: 10.17632/bkdpt2zpbd.1
Yi-Teng Hung,


Demonstration of stretch and pinch tests with corresponding ultrasound examination The acne rolling scar on the right medial zygoma showing a dimple sign in a pinch test and an uneven sign in a stretch test. The ultrasound examination of the acne rolling scar at rest showed a homogenous band (red box) disrupting and blurring the clear dermoepidermal junction and the junction between the dermis and the subcutaneous fascia. The irregularity of the skin surface was more evident after pinching and the homogenous blurring persisted after stretching, corresponding to a dimple sign and an uneven sign, respectively. Red line, dermoepidermal junction; Yellow line, junction between the dermis and the subcutaneous fascia



Chang Gung Memorial Hospital Linkou Branch


Dermatology, Scarring, Cosmeceutical Dermatology, Acne