Search for RASA1 Variants in Capillary Malformations of the Legs in 113 Children: Results from the French National Paediatric Cohort CONAPE.

Patients with an inherited autosomal-dominant disorder, capillary malformation-arteriovenous malformation (CM-AVM), frequently have mutations in Ras P21 protein activator 1 (RASA1). The aims of this study were to determine the prevalence of germline RASA1 variants in a French multicentre national cohort of children, age range 2-12 years, with sporadic occurrence of capillary malformation (CM) of the legs, whatever the associated abnormalities, and to identify genotype-phenotype correlates. DNA was extracted from leukocytes in blood samples, purified and amplified, and all exons of the RASA1 gene were analysed. Among 113 children analysed, 7 had heterozygous variants (6.1%). Four different variants were identified; 2 were new. In children with RASA1 variants, CMs were more frequently bilateral and multifocal. In conclusion, RASA1 variants are rarely found in children with sporadic CM of lower limbs without CM-AVM syndrome. CMs in this study were heterogeneous, and no disease-causing relationship could be proven.

Plaque-Like Myofibroblastic Tumor: Report of 4 Cases.

Plaque-like myofibroblastic tumor of infancy was first characterized in 2007 by Clarke et al. In the first 2 cases described, large plaque-like tumors presented in the first 3 months of life exhibited microscopic features consistent with dermatofibroma but with immunohistochemical features of myofibroblastic lineage. In 2013, Marqueling et al reported 3 additional cases, 2 of which presented in early childhood, prompting the authors to recommend that the name of this condition be shortened to plaque-like myofibroblastic tumor. We present here 4 additional cases to better characterize clinical and histopathological features of this newly recognized entity. This benign lesion is of myofibroblastic lineage and demonstrates features consistent with multiple clustered dermatofibroma.

The scalp hair collar and tuft signs: A retrospective multicenter study of 78 patients with a systematic review of the literature.

BACKGROUND: Hair collar sign (HCS) and hair tuft of the scalp (HTS) are cutaneous signs of an underlying neuroectodermal defect, but most available data are based on case reports. OBJECTIVE: We sought to define the clinical spectrum of HCS and HTS, clarify the risk for underlying neurovascular anomalies, and provide imaging recommendations. METHODS: A 10-year multicenter retrospective and prospective analysis of clinical, radiologic, and histopathologic features of HCS and HTS in pediatric patients was performed. RESULTS: Of the 78 patients included in the study, 56 underwent cranial and brain imaging. Twenty-three of the 56 patients (41%) had abnormal findings, including the following: (1) cranial/bone defect (30.4%), with direct communication with the central nervous system in 28.6%; (2) venous malformations (25%); or (3) central nervous system abnormalities (12.5%). Meningeal heterotopia in 34.6% (9/26) was the most common neuroectodermal association. Sinus pericranii, paraganglioma, and combined nevus were also identified. LIMITATIONS: The partial retrospective design and predominant recruitment from the dermatology department are limitations of this study. CONCLUSIONS: Infants with HCS or HTS are at high risk for underlying neurovascular anomalies. Magnetic resonance imaging scans should be performed in order to refer the infant to the appropriate specialist for management.

IFAG and childhood rosacea: a possible link?

Idiopathic facial aseptic granuloma (IFAG) is a disorder that usually occurs during early childhood. Its pathogenesis remains poorly understood. The objective of this study was to investigate possible relationships between IFAG and childhood rosacea. This was a retrospective multicenter study of patients attending four French dermatologic centers diagnosed with IFAG between October 2000 and July 2007. Patients and their parents were asked to come for a follow-up visit or to make an appointment for a telephone interview. Clinical symptoms of childhood rosacea were recorded: flushing, permanent or recurrent erythema; facial telangiectasia; papules and pustules on the face without comedones or microcysts; preferential location of the lesions on the convexity of the face; and ophthalmologic involvement of rosacea (recurrent chalazions, conjunctival hyperemia, keratitis). Thirty-eight patients, 20 girls and 18 boys, were included in the study. The median age at the time of diagnosis of IFAG was 43 months, with a median follow-up of 3.9 years. Sixteen patients (42.1%) had at least two criteria of childhood rosacea, 11 of 32 (34.4%) with a single lesion and 5 of 6 (83.3%) with multiple lesions. Children with IFAG are at risk for childhood rosacea, and follow-up is advised, including periodic ophthalmologic assessment.

Primary cutaneous Epstein-Barr virus-related lymphoproliferative disorders in 4 immunosuppressed children.

Primary cutaneous Epstein-Barr virus-related lymphoproliferative disorders are rare. We describe 4 cases in children: two with acquired immunodeficiencies (HIV infection, heart transplantation) and two with congenital immunodeficiencies (ataxia-telangiectasia and an undetermined disease affecting the T lymphocytes). Two of the lymphoproliferative disorders were T-cell types and two were B-cell types. The two T-cell types were also Epstein-Barr virus positive, which is extremely rare. Three of the patients developed extracutaneous disease with poor outcome, resulting in death.

Chronic infantile neurological, cutaneous, and articular syndrome with severe early articular manifestations.

We report an 11-month-old boy of French origin who had chronic, infantile, neurological, cutaneous, and articular syndrome with a particularly severe joint involvement with early onset. The diagnosis was based on the association of neurologic, cutaneous (urticarial skin eruption), and articular manifestations accompanied by recurrent bouts of fever. No mutation of the CIAS1 gene could be identified. Skeletal involvement was particularly severe, leading to considerable limitation of motion.