Similarities and disparities: a good way of learning

Multiple diseases share a common group of signs and symptoms and this is the base for the syndromic reasoning. Dermatological signs with similar aspect can be seen in different entities but some key data can help to reach the diagnosis…

We present here two dermatological lesions with similarities in terms of shape and color. Figure 1 is a mycosis in a patient under immunosuppresive treatment. Figure 2 is a discoid lupus. Although the etiology and mechanism are different the aspect is quite similar but discoid lupus is located mainly in the face, ears and scalp.