New clinical evaluation method for lesion count in patients with truncal acne

Acne is a skin condition of the pilosebaceous unit that affects mainly the face, chest and trunk. Most studies focus on facial acne. Few papers specifically address truncal acne: (Tan, 2021; Dréno, 2021), most of which being directed to the back and upper chest. Nevertheless, approximately 50% of patients with facial acne also have acne on the trunk. Taking into account that acne can affect all truncal area, during the evaluation of anti-acne products, it is important to delineate the area that will be evaluated by the dermatologist to reduce intra and inter-evaluators variabilities the studies limitations. Therefore, this study aims to include a new methodology to evaluate the truncal count of lesions.