Search

Abstract Rheumatoid neutrophilic dermatitis (RND) is a dermatological condition typically associated with rheumatoid arthritis (RA). The low prevalence of RND and the wide spectrum of its possible clinical appearances make the diagnosis challenging. Current literature is still lacking a comprehensive overview of this rare cutaneous disorder. The aim of this review is to summarize data from the existing literature on RND, focusing on its epidemiology, clinical manifestations, histopathology and treatment. Hence, a comprehensive literature search of case reports and series was made, starting from a Medline (via PubMed) and Scopus databases. We also included in the analysis one patient attending to our dermatology department and diagnosed with RND. Overall, 54 cases of RND were identified. The majority of patients were female (72.3%) with a median (IQR) age at the time of diagnosis of 58 (65‐45) years. RND followed the onset of RA in 87% of patients with an average (SD) latency time of approximately 10 (8.9) years. In 1 (1.8%) case the dermatitis preceded the appearance of joint symptoms, while in three (5.5%) cases it occurred concomitantly with them. Seropositive RA was the major associated form (76.5%). Clinically, asymptomatic papules (31%), nodules (15.1%) and/or plaques (13.5%) distributed bilaterally on extremities were most frequently described. Notably, females were more prone to develop a painful dermatitis (84.6%) compared to males. The vesicobullous (12.7%) and pustular (9.2%) clinical subtypes were the most demonstrative in contrast to the urticarial skin manifestations and the potential figurative/annular distribution of the lesions. Spontaneous resolution of RND was rare (5.5%). Systemic treatments, mainly represented by steroids and anti‐neutrophilic agents (dapsone, colchicine), were consistently required.

Background: Congenital triangular alopecia (CTA) is a benign, asymptomatic, nonprogressive, localized and noncicatricial type of alopecia that is usually first noted during infancy or childhood. The pattern of hair loss is traditionally described as triangular, oval or lancet shaped with apex toward the vertex. Objectives: We present a case series of CTA located in unusual sites. Patients and Methods: We performed trichoscopy in 78 patients with CTA. From this group, we selected 10 individuals (4 males and 6 females) whose disease was not localized on the typical scalp area. Results: The alopecic area was located on the occipital region in 5 patients, the parietal region in 4 patients, at the vertex in 1. With trichoscopy, vellus hairs were detected in all patients, and evidence of empty follicles was noticed only in 3 patients. Conclusions: In contrast with the preconceived notion that all CTAs are frontotemporal, our case series points out that this disease could be localized in other scalp sites.

Abstract Koebner phenomenon regards the formation of a psoriatic lesion after a trauma, including tattoo, insect bite or other injuries. Although this manifestation is not specific for psoriasis, physicians should be aware because early recognition may be helpful in making the diagnosis when present.