Pigmented purpuric dermatoses (PPD) include several skin diseases characterized by multiple petechial hemorrhage as consequence of capillaritis. PPD generally present with red to purple macules that progressively evolve to golden-brown color as the hemosiderin is reabsorbed. These lesions, often asymptomatic or associated with mild pruritus, usually occur on the lower extremities and may be a diagnostic and therapeutic challenge both for general practitioners and specialists in internal medicine or flebology. Clinical presentations include many subtypes that have been described over the years, although histology is usually superimposable. Prompt recognition and patient reassurance on the benign nature of these diseases is crucial. In this comprehensive review, we focused on pathogenesis and clinical pictures.

Maskne, a newly coined term deriving from the contraction of mask-related acne, is a form of mechanical acne resulting from continuous textile–skin adherence and friction. Prolonged mask use heats up the face environment, thus modifying skin microbiota and sebum production. Although effective prevalence is unknown, since the pandemic began and the prolonged use of masks was extended to the general population, maskne has been a frequent topic of consultation among dermatologists. This term has been successfully introduced into common language, with more than 200,000 hashtags on social media, where it is also possible to find “home remedies” that can worsen this dermatosis. The aim of this paper is to discuss the pathogenesis, address clinicians on the correct differential diagnoses among facial dermatoses, and move towards the correct therapy.

Since SARS‐COV‐2 pandemic began, frontline healthcare workers demonstrated to develop facial dermatoses, such as acne, rosacea and seborrheic dermatitis, secondary to prolonged use of personal protective equipment (PPE)

Background: Incidence of cutaneous melanoma is steadily growing, and its early recognition is of paramount importance. Small, pigmented lesions often represent a challenge for the clinician, as predictors of melanoma have not yet been uniquely identified in this setting.Objectives: To identify dermoscopic features that aid in distinguishing small diameter melanomas (≤5 mm) from equivocal melanocytic nevi measuring ≤5 mm.Methods: A retrospective multicenter study was conducted to collect demographics, clinical and dermoscopic pictures of (i) histology‐proven flat melanomas, measuring ≤5 mm, (ii) histology‐proven but clinically/dermoscopically equivocal melanocytic nevi measuring ≤5 mm, and (iii) histology‐proven flat melanomas, measuring >5 mm. An independent dermoscopic evaluation was performed. Differences in predefined dermoscopic features were assessed across the three groups.Results: A total of 103 melanomas measuring ≤5 mm were collected; 166 control lesions, comprising 85 large (>5 mm) melanomas and 81 dubious, clinically equivocal melanocytic nevi measuring ≤5 mm were included. Of the 103 mini‐melanomas, only 44 were melanoma in situ. Five dermoscopic predictors of melanoma were identified for the assessment of flat, non‐facial melanocytic lesions measuring ≤5 mm, namely: atypical pigment network, blue‐white veil, pseudopods, peripheral radial streaks, and presence of more than one color. The latter were combined into a predictive model capable of identifying melanoma with 65% sensitivity and 86.4% specificity, at a cut‐off score of 3. Among melanomas measuring ≤5 mm, presence of a blue‐white veil (P = 0.0027) or negative pigment network (P = 0.0063) was associated with invasiveness.Conclusion: A set of five dermoscopic predictors of melanoma, atypical pigment network, blue‐white veil, pseudopods, peripheral radial streaks, and presence of more than one color is proposed for the assessment of flat, non‐facial melanocytic lesions measuring ≤5 mm.

Pemphigus is a group of blistering disorders characterized by the formation of intraepithelial blisters in skin and mucous membranes induced by the binding of circulating autoantibodies to intercellular adhesion molecules. The pathogenesis is complex and not fully understood; however, genetic predisposition and various triggers are widely accepted as key factors in pemphigus development. A few cases of new‐onset pemphigus following coronavirus disease 2019 (COVID‐19) vaccination have already been published. The present paper reports a total of two cases of pemphigus foliaceous and three cases of pemphigus vulgaris that occurred following vaccinations against COVID‐19, with anamnestic, clinical, and diagnostic data collection suggesting assumptions over a possible causal correlation.