[Prurigo pigmentosa: Case report of a German adolescent].

Prurigo pigmentosa is an inflammatory dermatosis that rarely occurs in Europe and mostly affects young women. Here, we describe the typical clinical and dermoscopic criteria so that therapy can be initiated as early as possible. The 17-year-old patient presented here shows that this disease can also be observed in Western Europe and in men, and that doxycycline is a very effective treatment option.

Collective human intelligence outperforms artificial intelligence in a skin lesion classification task.

Background And Objectives: Convolutional neural networks (CNN) enable accurate diagnosis of medical images and perform on or above the level of individual physicians. Recently, collective human intelligence (CoHI) was shown to exceed the diagnostic accuracy of individuals. Thus, diagnostic performance of CoHI (120 dermatologists) versus individual dermatologists versus two state-of-the-art CNN was investigated.

Waldenström macroglobulinaemia presenting as tingling ulcers on the feet.

A 56-year-old man presented with tingling ulcers on the feet. On further skin examination, papules on the knees were observed. Biopsies revealed extravascular eosinophilic deposits of IgM, and Waldenström macroglobulinaemia was diagnosed.

Five patients with melanosis of the nipple and areola clinically mimicking melanoma.

Background: Pigmented lesions on the nipple and areola concern patients and physicians as melanoma and pigmented mammary Paget's disease must be considered in the differential diagnoses. There have been only six case reports of melanosis of the nipple and areola in the medical literature yet five cases presented to our department in a 26-month period.

Method: Five women aged between 26 and 34 years presented with pigmentation of the areola and/or nipple.