Medical Lasers; Engineering, Basic Research, and Clinical Application 2018; 7(1): 28-31  
Broadband Light Treatment for Multiple Benign Lichenoid Keratoses of Flat Erythematous Type
Mi Ryung Roh1, Sung Bin Cho2,3
1Department of Dermatology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea 2Department of Dermatology and Cutaneous Biology Research Center, International St. Mary’s Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea 3Kangskin Sillim Dermatology Clinic, Seoul, Korea
Correspondence to: Sung Bin Cho, Department of Dermatology and Cutaneous Biology Research Center, International St. Mary’s Hospital, Catholic Kwandong University College of Medicine, 25 Simgok-ro, Seo-gu, Incheon 22711, Korea, Tel.: +82-32-290-3141, Fax: +82-32-290-3142, E-mail: drsbcho@gmail.com
Received: June 13, 2018; Accepted: June 18, 2018; Published online: June 30, 2018.
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Abstract
Benign lichenoid keratosis (BLK) presents as solitary or multiple pink-violaceous to rusty brown macules or papules on the extremities, chest, and face. Clinically, BLK lesions are categorized into flat erythematous, flat pigmented, and plaque-like types. This paper describes a Korean patient with multiple, early stage, flat erythematous type BLK lesions on the face who was treated effectively and safely with a single session of broadband light (BBL) treatment. The patient underwent one session of a BBL treatment at a fluence of 8-9 J/cm2 and a pulse duration of 15-20 msec over multiple passes using 500-nm- and 515-nm cut-off filters. One month after the BBL treatment, significant improvement in flat erythematous BLK lesions, along with mild hyperpigmentation, was recorded, and the patient was satisfied with the results. Early and non-invasive intervention with BBL energy using proper cut-off filters according to the characteristics of the BLK lesions can effectively reduce inflammatory reactions and prevent disease progression.
Keywords: Benign lichenoid keratosis; Lichen planus-like keratosis; Flat erythematous type; Broadband light; Solar lentigo


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