Active clinical trials for "Chilblains"

Cases of chilblains have been reported with an unusual frequency in France in the context of the COronaVirus Infectious Disease 2019 (COVID-19) epidemic. Some of these cases have been linked to a virological status in favour of a recent Severe Acute Respiratory Syndrome CoronaVirus 2 (SARS-CoV-2) infection. Chilblains are acral inflammatory lesion typically reactive to cold (primary form). There are secondary forms acquired during autoimmune connectivitis such as lupus chilblain or hereditary forms related to type I Interferonopathy. An interferon type I signature has been described in these secondary forms of frostbite but also during the cytokine storm of severe forms of CoV-2 SARS infection. If cases of frostbite are indeed secondary to an SARS-CoV-2 infection, comparative analysis of their immunopathological profiles could provide a better understanding of the inflammatory mechanisms during COVID-19.

Chilblains (inflammatory lesion of the feet or hands) have been reported with an unusual frequency during the confinement period, most commonly in children, teenagers and young adults. The aim of the ECCES study is to find out whether these manifestations of chilblains can be linked to the SARS-CoV-2 coronavirus. For this, an epidemiologic study will compare two types of family (or more precisely people who were confined together in March-April-May): "case family" in which at least one of the members had chilblains "comparator family" in which none of the members had chilblains Environment (home lockdown) of the two types of family will be analyzed. Each member of the "family" will be suggested doing a serological test.

Chilblains are cutaneous lesions affecting extremities (foot and fingers) with erythemic papules, evolving by painful relapse due to cold and sudden reheating. This pathology is currently poorly understood while it's frequent. The aim of the study is to evaluate all the characteristics of this pathology by reporting clinical and biological data of patient consulting for chilblains; and the other point is to assess the evolution of these patients.

Some patients infected by covid-19 develop skin manifestations. These manifestations are still not well known and there pathophysiology remain unclear. Among them, acral manifestation resembling to chilblains appears frequent and quite specific. The aim of this project is to better characterize the cutaneous manifestations occurring during Covid-19 infection with a special focus on chilblains. These acral manifestation could be due to a direct viral effect, but also to microthrombosis or vascularitis. Understanding the pathomechanisms involved could provide interesting clue for understanding not only the skin manifestations but also some of the other systemic symptoms associated to covid-19 infection. This study plan to characterize these acral manifestations by analyzing the clinical and dermoscopic patterns and to correlate them with the non-invasive vascular explorations but also immune and coagulopathy explorations that are done in the CHU of Nice in covid-19 patients.