[Teledermatology in Switzerland : Set-up for and examples of dermatological treatment from a telemedicine center]. / Teledermatologie in der Schweiz : Anwendungsbeispiele zur Behandlung von dermatologischen Fragestellungen anhand eines telemedizinischen Zentrums.

BACKGROUND AND OBJECTIVES: In Switzerland, telemedicine has been an integral part of the health care system for many years and plays a significant role in basic medical care. Telemedicine is particularly suitable for skin diseases, thanks to the possibility of diagnostic imaging. The aim of this article is to point to services and structures needed using the example of a successful telemedicine center (Medgate Tele Clinic, Basel, Switzerland) and to illustrate the wide range of applications of telemedicine available in Switzerland based on examples from teledermatology. MATERIALS AND METHODS: This article describes how a telemedicine center functions, with particular emphasis on teledermatology. As examples, some of the dermatological disorders that have been treated only using teledermatology will be presented. RESULTS AND DISCUSSION: In about half of all cases, physicians working at the above-mentioned telemedicine center can complete treatment of their patients over the phone or video, so that no further appointment with a doctor is necessary. Many dermatological problems (such as pityriasis versicolor, perioral dermatitis or rosacea without eye involvement) can be treated particularly well with telemedicine.

Collision skin lesions-results of a multicenter study of the International Dermoscopy Society (IDS).

BACKGROUND: Collision lesions as two independent and unrelated skin tumors often manifest an atypical morphology. OBJECTIVE: To determine the combinations of collision skin lesions (CSLs). METHODS: Twenty-one pigmented lesion clinics in nine countries included 77 histopathologically proven CSLs in this retrospective observational study. RESULTS: Seventy-seven CSLs from 75 patients (median age 59.8 years) were analyzed; 24.7% of CSLs were located on the head and neck area, 5.2% on the upper extremities, 48.1% on the trunk, and 11.7% on the lower extremities; 40.3% revealed a melanocytic component (median age 54.7 years), followed by 45.5% with a basal cell carcinoma (BCC) (median age 62.4 years) and 11.7% with a seborrheic keratosis (median age 64.7 years). CSLs with a BCC component were more often found on the head and neck area compared to tumors with a melanocytic component (34.3% versus 16.1%). Lesions with a melanocytic component were more often detected on the trunk compared to lesions with a BCC (64.5% versus 37.1%). Patients with CSLs with epidermal-epidermal cell combination were older than patients with epidermal-dermal cell combination (63 versus 55.2 years), were more often male than female (63% versus 43.3%), more often had the lesion on the head and neck area (32.6% versus 13.3%), and less often on the upper (2.2 % versus 10%) or lower extremities (8.7% versus 16.6%). CONCLUSIONS: CSLs consist of a heterogeneous group of lesions of varying cell types. They are associated with advancing age and cumulative UV-exposure. CSLs manifest a complex morphology making it challenging to diagnose correctly.