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After administration of injectable vaccines, skin manifestations are common and they usually disappear in a few hours or days. We describe a case series of recurrent injection site reactions in 8 children undergoing vaccines of the regional immunization schedule, which required specialized evaluation and advice for subsequent vaccinations. Two clinical patterns of reactions were observed. Four children manifested recurrent wheal and erythema with pruritus at vaccine injection site for up to 7 months; the remaining children showed an itching plaque or nodule at injection site, that lasted several months after vaccination with exacerbations of pruritus and erythema. Hypersensitivity to aluminium salts was demonstrated in the second group. The flare-up manifestations, related to Meningococcal B vaccine in 5 reactions, were triggered by concurrent viral infections in two patients. Communication of risks and diagnostic testing, when appropriate, resulted important to reassure parents of children and favour adequate completion of vaccination.

Cantú syndrome, or hypertrichotic osteochondrodysplasia, is a rare autosomal dominant disease characterized by congenital hypertrichosis, characteristic dysmorphisms, skeletal abnormalities and cardiomegaly. We report on a 7‐year‐old girl with congenital generalized hypertrichosis, coarse facial appearance and cardiac involvement, with a de novo heterozygous mutation (c.3461G > A) in the ABCC9 gene. During the annual cardiac follow‐up at the age of nine the echocardiogram showed mild left ventricular dilatation in consideration of which she started ramipril treatment. The progression of the clinical manifestations of Cantú syndrome highlights the relevance of an early diagnosis, including genetic analysis, and a multidisciplinary approach with long‐term follow‐up. Cantú syndrome is a rare autosomal dominant disease with a marked clinical variability that can cause diagnostic and therapeutic delay. The progression of the clinical manifestations of Cantú syndrome, including the cardiac involvement, highlights the relevance of an early diagnosis with long‐term follow‐up and a multidisciplinary approach.

Churg-Strauss syndrome (CSS) is a small-vessel vasculitis characterized by severe asthma, lung/tissues infiltrates, extravascular necrotizing granulomas, and eosinophilia. Cutaneous involvement is common but may not be highly suggestive. Two typical cases of CSS with cutaneous involvement are herein reported, both females, 37 and 54 years old, presenting with lower limbs palpable purpura and urticarial lesions of the neck, respectively. A comprehensive review of the literature showed that cutaneous manifestations occurred in 40-81% of CSS patients and were the presenting sign in 14% of the patients. Moreover, a total of 68 cases of CSS with a detailed description of the cutaneous lesions have been published. In the majority of these patients, skin lesions allowed for the histopathological diagnosis of CSS. The most common clinical features were papulo-nodules with the histological picture of extravascular Churg-Strauss granuloma followed by purpuric and/or necrotic lesions in the lower limbs corresponding to small-vessel vasculitis with eosinophils. Less common lesions included urticarial lesions and livedo reticularis. Therefore, a high index of suspicion on skin lesions and the proper lesion selection for histological examination may be very important for early diagnosis of CSS. Clinical-pathological correlation is essential, as both clinical and histological features are not pathognomonic.

A child who comes to our attention for the appearance of erythematous, scaly lesions localized to the upper and lower limbs for 2 months. Histological features suggested ichthyosiform disease and concomitant mutations in the SPINK5 and FLG2 genes confirmed Netherton syndrome with severe atopic manifestations. Our case is particularly interesting because it clearly highlights the clinical characteristics of a rare disease whose atopic manifestations have been aggravated by a concurrence of FLG2 and SPINK5 mutations. Furthermore, trichoscopy showing invaginated trichoresis could suggest an early diagnosis of Netherton syndrome.

Background Janus kinase (JAK) inhibitors, including upadacitinib, have been recently approved for the treatment of moderate-severe atopic dermatitis (AD) and real-world data on upadacitinib effectiveness and safety are limited. This interim analysis aimed to assess effectiveness and safety of upadacitinib throughout 48 weeks of observation in a real-world adult AD population. Methods This prospective study collected data on adult patients affected by moderate-to-severe AD and treated with upadacitinib at the dosage of either 15 mg or 30 mg daily based on the physician decision. Upadacitinib was prescribed in the context of a national compassionate use programme. In this interim analysis, within patient comparisons of continuous scores of different scales (namely Eczema Area and Severity Index [EASI], body surface area [BSA], Dermatology Life Quality Index [DLQI], Patient Oriented Eczema Measure [POEM], Numeric Rating Scale [NRS] subtests) were performed. The percentage of patients achieving EASI 75, EASI 90 and EASI 100 at Week 16, 32 and 48 was also evaluated. Results One hundred and forty-six patients were included in the analysis. Upadacitinib 15 mg or 30 mg daily was prescribed as monotherapy in most cases (127/146, 87.0%). Upadacitinib was initially prescribed at the dosage of 30 mg daily in 118 of 146 (80.8%) patients and 15 mg daily in 28/146 (19.2%) patients. A significant improvement in the clinical signs and symptoms of AD was detected by Week 16 and throughout the study period. EASI 75, EASI 90 and EASI 100 responses were achieved by 87.6%, 69.1% and 44.3% at Week 48, associated with a sustained reduction in the mean values of all physician-reported (EASI and BSA) and patient-reported (Itch- Sleep- and Pain-NRS, DLQI, and POEM) disease severity outcomes, up to 48 weeks of treatment. Treatment response observed in 15 mg upadacitinib-treated patients was comparable with that detected in 30 mg upadacitinib-treated patients, revealing no statistical difference between the two patient sub-cohorts. Through the observation period, dose reduction or escalation was observed in 38/146 (26%) of treated cases. Overall, 26 of 146 (17.8%) patients experienced at least one adverse event (AE) during the treatment period. In total, 29 AEs were recorded and most of them were evaluated as mild to moderate, while in 4 cases the occurrence of AE led to drug discontinuation, for a total of 7/146 (4.8%) dropouts. Conclusion This study provides strong evidence of a sustained response obtained by upadacitinib in AD patients, who had failed to respond to conventional or biological systemic agents, through 48 weeks of observation. Upadacitinib was also demonstrated to be advantageous in terms of flexibility in dose reduction or escalation as upadacitinib dose was shaped on clinical needs that, in a real-world setting, might frequently change.

Systemic mastocytosis (SM) and other adult clonal mast cell disorders (CMD) are often underestimated, and their epidemiology data are scarce. We aimed at evaluating the impact of the activity of the Interdisciplinary Group for Study of Mastocytosis (GISM) of Verona on the prevalence and incidence of CMD. We examined the data of 502 adult patients diagnosed with CMD and residing in the Veneto Region, consecutively referred to GISM between 2006 and 2020. SM was diagnosed in 431 cases, while 71 patients had cutaneous mastocytosis or other CMD. Indolent SM represented the most frequent SM variant (91.0%), mainly with the characteristics of bone marrow mastocytosis (54.8%). The prevalence of SM in the adult population of the Veneto region and of the Verona province was 10.2 and 17.2/100,000 inhabitants, respectively. The mean incidence of new SM cases in Verona was 1.09/100,000 inhabitants/year. Hymenoptera venom allergy was the main reason (50%) leading to the CMD diagnosis. Osteoporosis, often complicated by fragility fractures, was present in 35% of cases, even in young patients, especially males. Our data show a higher prevalence and incidence of SM than previously reported, confirming that reference centers with multidisciplinary approach are essential for the recognition and early diagnosis of CMD.

Drug-induced lupus erythematosus (DILE) is defined as a lupus-like syndrome temporally related to continuous drug exposure which resolves after discontinuation of the offending drug. There are currently no standard diagnostic criteria for DILE and the pathomechanisms are still unclear. Similarly to idiopathic lupus, DILE can be diveded into systemic (SLE), subacute cutaneous (SCLE) and chronic cutaneous lupus (CCLE). Systemic DILE is characterized by typical lupus-like symptoms including skin signs, usually mild systemic involvement and a typical laboratory profile with positive antinuclear and anti-histone antibodies, while anti-double strand (ds) DNA and anti-extractable nuclear antigens antibodies are rare. High risk drugs include hydralazine, procainamide and isoniazid. Drug-induced SCLE is very similar to idiopathic SCLE in terms of clinical and serologic characteristic, and it is more common than the systemic form of DILE. Drugs associated with SCLE include calcium channel blockers, angiotensin-converting enzyme inhibitors, interferons, thiazide diuretics and terbinafine. Drug-induced CCLE is very rarely reported in the literature and usually refers to fluorouracile agents or non steroidal anti-inflammatory drugs. Recently, cases of DILE have been reported with anti-TNFα agents. These cases present with disparate clinical features including arthritis/arthralgia, skin rash, serositis, cytopenia and variable laboratory abnormalities. DILE to anti-TNFα agents differs in several ways to classic DILE. The incidence of rashes is higher compared to classical systemic DILE. In most cases of classic DILE visceral involvement is rare, whereas several cases of anti-TNFα DILE with evidence of renal disease have been reported. Low serum complement levels as well as anti-extractable nuclear antigen antibodies and anti-dsDNA antibodies are rarely present in classic DILE, whereas they are reported in half the cases of anti-TNFα DILE; in contrast, anti-histone antibodies are described in classic DILE more often than in anti-TNFα DILE. Recognition of DILE in patients receiving anti-TNFα therapy can be difficult due to the symptoms of their underlying disease. A temporal association (months to years) of the offending drug with characteristic or suggestive symptoms, and resolution of symptoms on drug withdrawal is the best evidence for this diagnosis of DILE.

Atopic dermatitis (AD) is a chronic, recurrent, inflammatory skin disease which predominantly affects children. However, AD may persist until adulthood (persistent AD), or directly start in adults (adult-onset AD). AD often shows a non-flexural rash distribution, and atypical morphologic variants in adults and specific diagnostic criteria are lacking. Moreover, adult AD prevalence as well as detailed data which can characterize persistent vs adult-onset subtype are scant. The aim of this study was to investigate on the main features of adult AD particularly highlighting differences between persistent vs adult-onset form. An Italian multicentre observational study was conducted between April 2015–July 2016 through a study-specific digital database. 253 adult AD patients were enrolled. Familiar history of AD was negative in 81.0%. Erythemato-desquamative pattern was the most frequent clinical presentation (74.3%). Flexural surface of upper limbs was most commonly involved (47.8%), followed by eyelid/periocular area (37.9%), hands (37.2%), and neck (32%). Hypertension (7.1%) and thyroiditis (4.3%) were the most frequent comorbidities. A subgroup analysis between persistent (59.7%) vs adult-onset AD patients (40.3%) showed significant results only regarding AD severity (severe disease was more common in persistent group, p  < 0.05), itch intensity (higher in adult-onset disease), and comorbidities (hypertension was more frequent in adult-onset group, p  < 0.01). Adult AD showed uncommon features such as significant association with negative AD family history and lacking of association with systemic comorbidities respect to general population. No significant differences among persistent vs adult-onset subgroup were registered except for hypertension, itch intensity, and disease severity.

Background Sturge–Weber Syndrome (SWS) is a rare, sporadic neurocutaneous disorder affecting the skin, brain, and eyes, due to somatic activating mutations in GNAQ or, less commonly, GNA11 gene. It is characterized by at least two of the following features: a facial capillary malformation, leptomeningeal vascular malformation, and ocular involvement. The spectrum of clinical manifestations includes headache, seizures, stroke-like events, intellectual disability, glaucoma, facial asymmetry, gingival hyperplasia, etc. An early diagnosis is crucial to guarantee an appropriate care, which is best performed in reference centres by multidisciplinary teams. The aim of this study was to develop a multidisciplinary expert consensus for diagnosis, treatment, and follow-up of all disease manifestations, according to the recommendations of the Italian Law on Rare Disease Care. Results Through a Delphi consensus methodology, 28 recommendations have been developed concerning (i) dermatological SWS manifestations and related treatment timing and modalities, (ii) neurological referral, diagnosis, pharmacological treatment of neurological signs and symptoms, neurosurgical indications, neurocognitive evaluation and related treatment, psychosocial support and patient follow-up, (iii) diagnosis of ophthalmological manifestations, medical and surgical treatment, and follow-up, (iv) maxillofacial surgical treatment, (v) oral cavity assessment, care and follow-up, and (vi) primary care paediatrician/general practitioner involvement. Conclusions The present consensus developed by a multidisciplinary group of experts from Italian reference centres comprises practical recommendations for SWS global management, including currently controversial issues. Specific statements for all disease aspects, from skin manifestations and neurological and ocular signs and symptoms to oral and maxillofacial care, are provided. They can be exploited to uniform clinical practice in reference centres, but also in other hospitals and outpatient settings. Though this consensus has been developed taking primarily into account the Italian National Health System organization and rules on rare disorders, it could be translated also to other countries.

Andrea Chiricozzi1,2 * Michela OrtoncellP * Donatella Schena· 1 2 3 4 * Niccolô Gori1,2 * Silvia Mariéi Ferrucci5 * Graziella Babino6 * Maddalena Napolitano7 8 · * Maria Concetta Fargnoli8,9 * Luca Stingeni10 * Mariateresa Rossi11 * Marco Romanelli12 * Riccardo Balestri13 * Michele Pellegrino14 * Aurora Parodi15 * Alberto Maria Bertoldi16 * Giovanni Palazzo17 * Flaminia Antonelli1,2 * Annalisa Pitino18 * GiovanniTripepi19 * Gabriella Fabbrocini7 * Anna Balato6 * Angelo Valerio Marzano5,20 * Giampiero Girolomoni4 * Simone Ribero3 * Ketty Peris1,2 Accepted: 2 August 2023 / Published online: 19 August 2023 © Springer Nature Switzerland AG 2023 Correction to: The original article can be found online at https://doi.org/10.1007/ s40257-023-00798-0. * Andrea Chiricozzi chiricozziandrea@gmail.com 1 Dermatologia, Dipartimento Universitario di Medicina e Chirurgia Traslazionale, Università Cattolica del Sacro Cuore, Largo A. Gemelli 8, 00168 Rome, Italy 2 UOC di Dermatologia, Dipartimento Scienze Mediche e Chirurgiche, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy 3 Section of Dermatology, Department of Medical Sciences, University of Turin, Turin, Italy 4 Section of Dermatology and Venereology, Department of Medicine, University of Verona, Verona, Italy 5 Dermatology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy 6 Dermatology Unit, University of Campania Luigi Vanvitelli, Naples, Italy 7 Section of Dermatology, Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy 8 Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy 9 Dermatology Unit, Ospedale San Salvatore, L'Aquila, Italy 10 Dermatology Section, Department of Medicine and Surgery, University of Perugia, Perugia, Italy 11 Dermatology Department, University of Brescia, Brescia, Italy 12 Department of Dermatology, University of Pisa, Pisa, Italy 13 Division of Dermatology, Santa Chiara Hospital, Trento, Italy 14 Dermatology Unit, Misericordia Hospital, Grosseto, Italy 15 Department of Health and Science (Dissal), Section of Dermatology, University of Genoa, Polyclinic Hospital San Martino, IRCCS, Genoa, Italy 16 Department of Dermatology, Hospital SS. Open Access This article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License, which permits any non-commercial use. sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.