[Pitfalls of Differential Diagnosis in Dermatologic Surgery].

Evaluation of skin diseases can be challenging for non-dermatologists. Even obvious well-characterized skin pathologies might be misleading and thus treatment can fail. Particularly the differentiation of surgical treated entities is important, for example the management of a wound healing disturbance profoundly differs from that of a pyoderma gangrenosum. This article outlines several easily mistaken pairs of dermatologic entities on one hand and surgical on the other. For example, a livedo vasculopathy can be confused with a leg ulcer, a nail melanoma with a simple hematoma and finally a hidradenitis suppurativa with an axillary abscess. Typical clinical signs and anamnestic data may often lead to the right diagnosis also assisted by the simple fact to "keep it in mind".