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Laurence Imhof, Speaker at Dermatology Conferences
Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
Title : Successful use of grenz rays for disseminated superficial actinic porokeratosis


Disseminated superficial actinic porokeratosis (DSAP) is a rare keratinization disorder with potential malignant transformation, for which present treatment strategies show limited success. In a retrospective study the response of DSAP lesions to grenz ray radiotherapy (RTx) was evaluated. Data of patients treated with RTx at University Hospital Zurich, Switzerland, between 2004 and 2015, were reviewed. Patients with DSAP, who received at least 1 RTx treatment session and who had been followed up for at least 4 weeks were included in the further data analysis. The study cohort consisted of 8 patients with a median age of 73 years. All were treated with grenz rays for DSAP. 7 of 8 patients showed complete clinical clearing of the lesions.


Laurence Imhof is the Director of Aesthetic Dermatology and Physical Therapy at the Department of Dermatology, Zurich University Hospital. Her clinical and scientific focus is on laser medicine, photobiology and radiation dermatology. She was trained in Washington DC, Miami FL, South Korea and Singapore, and in courses held at the Harvard Medical School (Boston, USA). She is a member of many national and international societies (e.g. ASLMS, ESLD, EADV) and serves as a scientific advisor for the Swiss Society for Laser Medicine. She leads training courses regarding physical therapy and aesthetic medicine in Zurich University Hospital and is a lecturer in numerous national and international congresses and courses.